21049820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{587}}^1$

素因数の和:770

約数の個数: 48

約数和(自身を含む): 48601728

約数和(自身を除く): 27551908

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 163, 220, 326, 587, 652, 815, 1174, 1630, 1793, 2348, 2935, 3260, 3586, 5870, 6457, 7172, 8965, 11740, 12914, 17930, 25828, 32285, 35860, 64570, 95681, 129140, 191362, 382724, 478405, 956810, 1052491, 1913620, 2104982, 4209964, 5262455, 10524910, 21049820]

約数ペア:

[(1, 21049820), (2, 10524910), (4, 5262455), (5, 4209964), (10, 2104982), (11, 1913620), (20, 1052491), (22, 956810), (44, 478405), (55, 382724), (110, 191362), (163, 129140), (220, 95681), (326, 64570), (587, 35860), (652, 32285), (815, 25828), (1174, 17930), (1630, 12914), (1793, 11740), (2348, 8965), (2935, 7172), (3260, 6457), (3586, 5870)]