16389640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 38880000

約数和(自身を除く): 22490360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 199, 232, 284, 290, 355, 398, 568, 580, 710, 796, 995, 1160, 1420, 1592, 1990, 2059, 2840, 3980, 4118, 5771, 7960, 8236, 10295, 11542, 14129, 16472, 20590, 23084, 28258, 28855, 41180, 46168, 56516, 57710, 70645, 82360, 113032, 115420, 141290, 230840, 282580, 409741, 565160, 819482, 1638964, 2048705, 3277928, 4097410, 8194820, 16389640]

約数ペア:

[(1, 16389640), (2, 8194820), (4, 4097410), (5, 3277928), (8, 2048705), (10, 1638964), (20, 819482), (29, 565160), (40, 409741), (58, 282580), (71, 230840), (116, 141290), (142, 115420), (145, 113032), (199, 82360), (232, 70645), (284, 57710), (290, 56516), (355, 46168), (398, 41180), (568, 28855), (580, 28258), (710, 23084), (796, 20590), (995, 16472), (1160, 14129), (1420, 11542), (1592, 10295), (1990, 8236), (2059, 7960), (2840, 5771), (3980, 4118)]