20740980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26591}}^1$

素因数の和:26616

約数の個数: 48

約数和(自身を含む): 62544384

約数和(自身を除く): 41803404

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26591, 53182, 79773, 106364, 132955, 159546, 265910, 319092, 345683, 398865, 531820, 691366, 797730, 1037049, 1382732, 1595460, 1728415, 2074098, 3456830, 4148196, 5185245, 6913660, 10370490, 20740980]

約数ペア:

[(1, 20740980), (2, 10370490), (3, 6913660), (4, 5185245), (5, 4148196), (6, 3456830), (10, 2074098), (12, 1728415), (13, 1595460), (15, 1382732), (20, 1037049), (26, 797730), (30, 691366), (39, 531820), (52, 398865), (60, 345683), (65, 319092), (78, 265910), (130, 159546), (156, 132955), (195, 106364), (260, 79773), (390, 53182), (780, 26591)]