20951580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26861}}^1$

素因数の和:26886

約数の個数: 48

約数和(自身を含む): 63179424

約数和(自身を除く): 42227844

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, 26861, 53722, 80583, 107444, 134305, 161166, 268610, 322332, 349193, 402915, 537220, 698386, 805830, 1047579, 1396772, 1611660, 1745965, 2095158, 3491930, 4190316, 5237895, 6983860, 10475790, 20951580]

約数ペア:

[(1, 20951580), (2, 10475790), (3, 6983860), (4, 5237895), (5, 4190316), (6, 3491930), (10, 2095158), (12, 1745965), (13, 1611660), (15, 1396772), (20, 1047579), (26, 805830), (30, 698386), (39, 537220), (52, 402915), (60, 349193), (65, 322332), (78, 268610), (130, 161166), (156, 134305), (195, 107444), (260, 80583), (390, 53722), (780, 26861)]