21112140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:236

約数の個数: 144

約数和(自身を含む): 70785792

約数和(自身を除く): 49673652

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 49, 60, 70, 84, 86, 98, 105, 129, 140, 147, 167, 172, 196, 210, 215, 245, 258, 294, 301, 334, 420, 430, 490, 501, 516, 588, 602, 645, 668, 735, 835, 860, 903, 980, 1002, 1169, 1204, 1290, 1470, 1505, 1670, 1806, 2004, 2107, 2338, 2505, 2580, 2940, 3010, 3340, 3507, 3612, 4214, 4515, 4676, 5010, 5845, 6020, 6321, 7014, 7181, 8183, 8428, 9030, 10020, 10535, 11690, 12642, 14028, 14362, 16366, 17535, 18060, 21070, 21543, 23380, 24549, 25284, 28724, 31605, 32732, 35070, 35905, 40915, 42140, 43086, 49098, 50267, 63210, 70140, 71810, 81830, 86172, 98196, 100534, 107715, 122745, 126420, 143620, 150801, 163660, 201068, 215430, 245490, 251335, 301602, 351869, 430860, 490980, 502670, 603204, 703738, 754005, 1005340, 1055607, 1407476, 1508010, 1759345, 2111214, 3016020, 3518690, 4222428, 5278035, 7037380, 10556070, 21112140]

約数ペア:

[(1, 21112140), (2, 10556070), (3, 7037380), (4, 5278035), (5, 4222428), (6, 3518690), (7, 3016020), (10, 2111214), (12, 1759345), (14, 1508010), (15, 1407476), (20, 1055607), (21, 1005340), (28, 754005), (30, 703738), (35, 603204), (42, 502670), (43, 490980), (49, 430860), (60, 351869), (70, 301602), (84, 251335), (86, 245490), (98, 215430), (105, 201068), (129, 163660), (140, 150801), (147, 143620), (167, 126420), (172, 122745), (196, 107715), (210, 100534), (215, 98196), (245, 86172), (258, 81830), (294, 71810), (301, 70140), (334, 63210), (420, 50267), (430, 49098), (490, 43086), (501, 42140), (516, 40915), (588, 35905), (602, 35070), (645, 32732), (668, 31605), (735, 28724), (835, 25284), (860, 24549), (903, 23380), (980, 21543), (1002, 21070), (1169, 18060), (1204, 17535), (1290, 16366), (1470, 14362), (1505, 14028), (1670, 12642), (1806, 11690), (2004, 10535), (2107, 10020), (2338, 9030), (2505, 8428), (2580, 8183), (2940, 7181), (3010, 7014), (3340, 6321), (3507, 6020), (3612, 5845), (4214, 5010), (4515, 4676)]