20705620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{821}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 47366928

約数和(自身を除く): 26661308

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 821, 970, 1261, 1642, 1940, 2522, 3284, 4105, 5044, 6305, 8210, 10673, 12610, 16420, 21346, 25220, 42692, 53365, 79637, 106730, 159274, 213460, 318548, 398185, 796370, 1035281, 1592740, 2070562, 4141124, 5176405, 10352810, 20705620]

約数ペア:

[(1, 20705620), (2, 10352810), (4, 5176405), (5, 4141124), (10, 2070562), (13, 1592740), (20, 1035281), (26, 796370), (52, 398185), (65, 318548), (97, 213460), (130, 159274), (194, 106730), (260, 79637), (388, 53365), (485, 42692), (821, 25220), (970, 21346), (1261, 16420), (1642, 12610), (1940, 10673), (2522, 8210), (3284, 6305), (4105, 5044)]