81276560

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{661}}^1$

素因数の和:756

約数の個数: 80

約数和(自身を含む): 199473840

約数和(自身を除く): 118197280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 53, 58, 80, 106, 116, 145, 212, 232, 265, 290, 424, 464, 530, 580, 661, 848, 1060, 1160, 1322, 1537, 2120, 2320, 2644, 3074, 3305, 4240, 5288, 6148, 6610, 7685, 10576, 12296, 13220, 15370, 19169, 24592, 26440, 30740, 35033, 38338, 52880, 61480, 70066, 76676, 95845, 122960, 140132, 153352, 175165, 191690, 280264, 306704, 350330, 383380, 560528, 700660, 766760, 1015957, 1401320, 1533520, 2031914, 2802640, 4063828, 5079785, 8127656, 10159570, 16255312, 20319140, 40638280, 81276560]

約数ペア:

[(1, 81276560), (2, 40638280), (4, 20319140), (5, 16255312), (8, 10159570), (10, 8127656), (16, 5079785), (20, 4063828), (29, 2802640), (40, 2031914), (53, 1533520), (58, 1401320), (80, 1015957), (106, 766760), (116, 700660), (145, 560528), (212, 383380), (232, 350330), (265, 306704), (290, 280264), (424, 191690), (464, 175165), (530, 153352), (580, 140132), (661, 122960), (848, 95845), (1060, 76676), (1160, 70066), (1322, 61480), (1537, 52880), (2120, 38338), (2320, 35033), (2644, 30740), (3074, 26440), (3305, 24592), (4240, 19169), (5288, 15370), (6148, 13220), (6610, 12296), (7685, 10576)]