20413600

素因数分解:

$2^5\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:135

約数の個数: 144

約数和(自身を含む): 56246400

約数和(自身を除く): 35832800

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 25, 32, 34, 38, 40, 50, 68, 76, 79, 80, 85, 95, 100, 136, 152, 158, 160, 170, 190, 200, 272, 304, 316, 323, 340, 380, 395, 400, 425, 475, 544, 608, 632, 646, 680, 760, 790, 800, 850, 950, 1264, 1292, 1343, 1360, 1501, 1520, 1580, 1615, 1700, 1900, 1975, 2528, 2584, 2686, 2720, 3002, 3040, 3160, 3230, 3400, 3800, 3950, 5168, 5372, 6004, 6320, 6460, 6715, 6800, 7505, 7600, 7900, 8075, 10336, 10744, 12008, 12640, 12920, 13430, 13600, 15010, 15200, 15800, 16150, 21488, 24016, 25517, 25840, 26860, 30020, 31600, 32300, 33575, 37525, 42976, 48032, 51034, 51680, 53720, 60040, 63200, 64600, 67150, 75050, 102068, 107440, 120080, 127585, 129200, 134300, 150100, 204136, 214880, 240160, 255170, 258400, 268600, 300200, 408272, 510340, 537200, 600400, 637925, 816544, 1020680, 1074400, 1200800, 1275850, 2041360, 2551700, 4082720, 5103400, 10206800, 20413600]

約数ペア:

[(1, 20413600), (2, 10206800), (4, 5103400), (5, 4082720), (8, 2551700), (10, 2041360), (16, 1275850), (17, 1200800), (19, 1074400), (20, 1020680), (25, 816544), (32, 637925), (34, 600400), (38, 537200), (40, 510340), (50, 408272), (68, 300200), (76, 268600), (79, 258400), (80, 255170), (85, 240160), (95, 214880), (100, 204136), (136, 150100), (152, 134300), (158, 129200), (160, 127585), (170, 120080), (190, 107440), (200, 102068), (272, 75050), (304, 67150), (316, 64600), (323, 63200), (340, 60040), (380, 53720), (395, 51680), (400, 51034), (425, 48032), (475, 42976), (544, 37525), (608, 33575), (632, 32300), (646, 31600), (680, 30020), (760, 26860), (790, 25840), (800, 25517), (850, 24016), (950, 21488), (1264, 16150), (1292, 15800), (1343, 15200), (1360, 15010), (1501, 13600), (1520, 13430), (1580, 12920), (1615, 12640), (1700, 12008), (1900, 10744), (1975, 10336), (2528, 8075), (2584, 7900), (2686, 7600), (2720, 7505), (3002, 6800), (3040, 6715), (3160, 6460), (3230, 6320), (3400, 6004), (3800, 5372), (3950, 5168)]