1640883920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{8009}}^1$

素因数の和:8232

約数の個数: 80

約数和(自身を含む): 4129891920

約数和(自身を除く): 2489008000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 197, 208, 260, 394, 520, 788, 985, 1040, 1576, 1970, 2561, 3152, 3940, 5122, 7880, 8009, 10244, 12805, 15760, 16018, 20488, 25610, 32036, 40045, 40976, 51220, 64072, 80090, 102440, 104117, 128144, 160180, 204880, 208234, 320360, 416468, 520585, 640720, 832936, 1041170, 1577773, 1665872, 2082340, 3155546, 4164680, 6311092, 7888865, 8329360, 12622184, 15777730, 20511049, 25244368, 31555460, 41022098, 63110920, 82044196, 102555245, 126221840, 164088392, 205110490, 328176784, 410220980, 820441960, 1640883920]

約数ペア:

[(1, 1640883920), (2, 820441960), (4, 410220980), (5, 328176784), (8, 205110490), (10, 164088392), (13, 126221840), (16, 102555245), (20, 82044196), (26, 63110920), (40, 41022098), (52, 31555460), (65, 25244368), (80, 20511049), (104, 15777730), (130, 12622184), (197, 8329360), (208, 7888865), (260, 6311092), (394, 4164680), (520, 3155546), (788, 2082340), (985, 1665872), (1040, 1577773), (1576, 1041170), (1970, 832936), (2561, 640720), (3152, 520585), (3940, 416468), (5122, 320360), (7880, 208234), (8009, 204880), (10244, 160180), (12805, 128144), (15760, 104117), (16018, 102440), (20488, 80090), (25610, 64072), (32036, 51220), (40045, 40976)]