20985720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:154

約数の個数: 192

約数和(自身を含む): 75841920

約数和(自身を除く): 54856200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 43, 49, 56, 60, 70, 83, 84, 86, 98, 105, 120, 129, 140, 147, 166, 168, 172, 196, 210, 215, 245, 249, 258, 280, 294, 301, 332, 344, 392, 415, 420, 430, 490, 498, 516, 581, 588, 602, 645, 664, 735, 830, 840, 860, 903, 980, 996, 1032, 1162, 1176, 1204, 1245, 1290, 1470, 1505, 1660, 1720, 1743, 1806, 1960, 1992, 2107, 2324, 2408, 2490, 2580, 2905, 2940, 3010, 3320, 3486, 3569, 3612, 4067, 4214, 4515, 4648, 4980, 5160, 5810, 5880, 6020, 6321, 6972, 7138, 7224, 8134, 8428, 8715, 9030, 9960, 10535, 10707, 11620, 12040, 12201, 12642, 13944, 14276, 16268, 16856, 17430, 17845, 18060, 20335, 21070, 21414, 23240, 24402, 24983, 25284, 28552, 31605, 32536, 34860, 35690, 36120, 40670, 42140, 42828, 48804, 49966, 50568, 53535, 61005, 63210, 69720, 71380, 74949, 81340, 84280, 85656, 97608, 99932, 107070, 122010, 124915, 126420, 142760, 149898, 162680, 174881, 199864, 214140, 244020, 249830, 252840, 299796, 349762, 374745, 428280, 488040, 499660, 524643, 599592, 699524, 749490, 874405, 999320, 1049286, 1399048, 1498980, 1748810, 2098572, 2623215, 2997960, 3497620, 4197144, 5246430, 6995240, 10492860, 20985720]

約数ペア:

[(1, 20985720), (2, 10492860), (3, 6995240), (4, 5246430), (5, 4197144), (6, 3497620), (7, 2997960), (8, 2623215), (10, 2098572), (12, 1748810), (14, 1498980), (15, 1399048), (20, 1049286), (21, 999320), (24, 874405), (28, 749490), (30, 699524), (35, 599592), (40, 524643), (42, 499660), (43, 488040), (49, 428280), (56, 374745), (60, 349762), (70, 299796), (83, 252840), (84, 249830), (86, 244020), (98, 214140), (105, 199864), (120, 174881), (129, 162680), (140, 149898), (147, 142760), (166, 126420), (168, 124915), (172, 122010), (196, 107070), (210, 99932), (215, 97608), (245, 85656), (249, 84280), (258, 81340), (280, 74949), (294, 71380), (301, 69720), (332, 63210), (344, 61005), (392, 53535), (415, 50568), (420, 49966), (430, 48804), (490, 42828), (498, 42140), (516, 40670), (581, 36120), (588, 35690), (602, 34860), (645, 32536), (664, 31605), (735, 28552), (830, 25284), (840, 24983), (860, 24402), (903, 23240), (980, 21414), (996, 21070), (1032, 20335), (1162, 18060), (1176, 17845), (1204, 17430), (1245, 16856), (1290, 16268), (1470, 14276), (1505, 13944), (1660, 12642), (1720, 12201), (1743, 12040), (1806, 11620), (1960, 10707), (1992, 10535), (2107, 9960), (2324, 9030), (2408, 8715), (2490, 8428), (2580, 8134), (2905, 7224), (2940, 7138), (3010, 6972), (3320, 6321), (3486, 6020), (3569, 5880), (3612, 5810), (4067, 5160), (4214, 4980), (4515, 4648)]