28032680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 73543680

約数和(自身を除く): 45511000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 37, 40, 47, 52, 62, 65, 74, 94, 104, 124, 130, 148, 155, 185, 188, 235, 248, 260, 296, 310, 370, 376, 403, 470, 481, 520, 611, 620, 740, 806, 940, 962, 1147, 1222, 1240, 1457, 1480, 1612, 1739, 1880, 1924, 2015, 2294, 2405, 2444, 2914, 3055, 3224, 3478, 3848, 4030, 4588, 4810, 4888, 5735, 5828, 6110, 6956, 7285, 8060, 8695, 9176, 9620, 11470, 11656, 12220, 13912, 14570, 14911, 16120, 17390, 18941, 19240, 22607, 22940, 24440, 29140, 29822, 34780, 37882, 45214, 45880, 53909, 58280, 59644, 69560, 74555, 75764, 90428, 94705, 107818, 113035, 119288, 149110, 151528, 180856, 189410, 215636, 226070, 269545, 298220, 378820, 431272, 452140, 539090, 596440, 700817, 757640, 904280, 1078180, 1401634, 2156360, 2803268, 3504085, 5606536, 7008170, 14016340, 28032680]

約数ペア:

[(1, 28032680), (2, 14016340), (4, 7008170), (5, 5606536), (8, 3504085), (10, 2803268), (13, 2156360), (20, 1401634), (26, 1078180), (31, 904280), (37, 757640), (40, 700817), (47, 596440), (52, 539090), (62, 452140), (65, 431272), (74, 378820), (94, 298220), (104, 269545), (124, 226070), (130, 215636), (148, 189410), (155, 180856), (185, 151528), (188, 149110), (235, 119288), (248, 113035), (260, 107818), (296, 94705), (310, 90428), (370, 75764), (376, 74555), (403, 69560), (470, 59644), (481, 58280), (520, 53909), (611, 45880), (620, 45214), (740, 37882), (806, 34780), (940, 29822), (962, 29140), (1147, 24440), (1222, 22940), (1240, 22607), (1457, 19240), (1480, 18941), (1612, 17390), (1739, 16120), (1880, 14911), (1924, 14570), (2015, 13912), (2294, 12220), (2405, 11656), (2444, 11470), (2914, 9620), (3055, 9176), (3224, 8695), (3478, 8060), (3848, 7285), (4030, 6956), (4588, 6110), (4810, 5828), (4888, 5735)]