20213878840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{2731}}^1\times {\mathrm{9739}}^1$

素因数の和:12500

約数の個数: 64

約数和(自身を含む): 47897424000

約数和(自身を除く): 27683545160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 2731, 5462, 9739, 10924, 13655, 19478, 21848, 27310, 38956, 48695, 51889, 54620, 77912, 97390, 103778, 109240, 185041, 194780, 207556, 259445, 370082, 389560, 415112, 518890, 740164, 925205, 1037780, 1480328, 1850410, 2075560, 3700820, 7401640, 26597209, 53194418, 106388836, 132986045, 212777672, 265972090, 505346971, 531944180, 1010693942, 1063888360, 2021387884, 2526734855, 4042775768, 5053469710, 10106939420, 20213878840]

約数ペア:

[(1, 20213878840), (2, 10106939420), (4, 5053469710), (5, 4042775768), (8, 2526734855), (10, 2021387884), (19, 1063888360), (20, 1010693942), (38, 531944180), (40, 505346971), (76, 265972090), (95, 212777672), (152, 132986045), (190, 106388836), (380, 53194418), (760, 26597209), (2731, 7401640), (5462, 3700820), (9739, 2075560), (10924, 1850410), (13655, 1480328), (19478, 1037780), (21848, 925205), (27310, 740164), (38956, 518890), (48695, 415112), (51889, 389560), (54620, 370082), (77912, 259445), (97390, 207556), (103778, 194780), (109240, 185041)]