638420120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{20809}}^1$

素因数の和:20892

約数の個数: 64

約数和(自身を含む): 1573236000

約数和(自身を除く): 934815880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 767, 1180, 1534, 2360, 3068, 3835, 6136, 7670, 15340, 20809, 30680, 41618, 83236, 104045, 166472, 208090, 270517, 416180, 541034, 832360, 1082068, 1227731, 1352585, 2164136, 2455462, 2705170, 4910924, 5410340, 6138655, 9821848, 10820680, 12277310, 15960503, 24554620, 31921006, 49109240, 63842012, 79802515, 127684024, 159605030, 319210060, 638420120]

約数ペア:

[(1, 638420120), (2, 319210060), (4, 159605030), (5, 127684024), (8, 79802515), (10, 63842012), (13, 49109240), (20, 31921006), (26, 24554620), (40, 15960503), (52, 12277310), (59, 10820680), (65, 9821848), (104, 6138655), (118, 5410340), (130, 4910924), (236, 2705170), (260, 2455462), (295, 2164136), (472, 1352585), (520, 1227731), (590, 1082068), (767, 832360), (1180, 541034), (1534, 416180), (2360, 270517), (3068, 208090), (3835, 166472), (6136, 104045), (7670, 83236), (15340, 41618), (20809, 30680)]