21903180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28081}}^1$

素因数の和:28106

約数の個数: 48

約数和(自身を含む): 66048864

約数和(自身を除く): 44145684

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, 28081, 56162, 84243, 112324, 140405, 168486, 280810, 336972, 365053, 421215, 561620, 730106, 842430, 1095159, 1460212, 1684860, 1825265, 2190318, 3650530, 4380636, 5475795, 7301060, 10951590, 21903180]

約数ペア:

[(1, 21903180), (2, 10951590), (3, 7301060), (4, 5475795), (5, 4380636), (6, 3650530), (10, 2190318), (12, 1825265), (13, 1684860), (15, 1460212), (20, 1095159), (26, 842430), (30, 730106), (39, 561620), (52, 421215), (60, 365053), (65, 336972), (78, 280810), (130, 168486), (156, 140405), (195, 112324), (260, 84243), (390, 56162), (780, 28081)]