20868650

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2039

約数の個数: 48

約数和(自身を含む): 44595360

約数和(自身を除く): 23726710

約数列:

[1, 2, 5, 10, 11, 19, 22, 25, 38, 50, 55, 95, 110, 190, 209, 275, 418, 475, 550, 950, 1045, 1997, 2090, 3994, 5225, 9985, 10450, 19970, 21967, 37943, 43934, 49925, 75886, 99850, 109835, 189715, 219670, 379430, 417373, 549175, 834746, 948575, 1098350, 1897150, 2086865, 4173730, 10434325, 20868650]

約数ペア:

[(1, 20868650), (2, 10434325), (5, 4173730), (10, 2086865), (11, 1897150), (19, 1098350), (22, 948575), (25, 834746), (38, 549175), (50, 417373), (55, 379430), (95, 219670), (110, 189715), (190, 109835), (209, 99850), (275, 75886), (418, 49925), (475, 43934), (550, 37943), (950, 21967), (1045, 19970), (1997, 10450), (2090, 9985), (3994, 5225)]