20246980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1811}}^1$

素因数の和:1876

約数の個数: 48

約数和(自身を含む): 46880064

約数和(自身を除く): 26633084

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 1811, 2236, 2795, 3622, 5590, 7244, 9055, 11180, 18110, 23543, 36220, 47086, 77873, 94172, 117715, 155746, 235430, 311492, 389365, 470860, 778730, 1012349, 1557460, 2024698, 4049396, 5061745, 10123490, 20246980]

約数ペア:

[(1, 20246980), (2, 10123490), (4, 5061745), (5, 4049396), (10, 2024698), (13, 1557460), (20, 1012349), (26, 778730), (43, 470860), (52, 389365), (65, 311492), (86, 235430), (130, 155746), (172, 117715), (215, 94172), (260, 77873), (430, 47086), (559, 36220), (860, 23543), (1118, 18110), (1811, 11180), (2236, 9055), (2795, 7244), (3622, 5590)]