20270380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1471}}^1$

素因数の和:1546

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 26468564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1471, 2756, 2942, 3445, 5884, 6890, 7355, 13780, 14710, 19123, 29420, 38246, 76492, 77963, 95615, 155926, 191230, 311852, 382460, 389815, 779630, 1013519, 1559260, 2027038, 4054076, 5067595, 10135190, 20270380]

約数ペア:

[(1, 20270380), (2, 10135190), (4, 5067595), (5, 4054076), (10, 2027038), (13, 1559260), (20, 1013519), (26, 779630), (52, 389815), (53, 382460), (65, 311852), (106, 191230), (130, 155926), (212, 95615), (260, 77963), (265, 76492), (530, 38246), (689, 29420), (1060, 19123), (1378, 14710), (1471, 13780), (2756, 7355), (2942, 6890), (3445, 5884)]