1561980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{3719}}^1$

素因数の和:3738

約数の個数: 48

約数和(自身を含む): 4999680

約数和(自身を除く): 3437700

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 3719, 7438, 11157, 14876, 18595, 22314, 26033, 37190, 44628, 52066, 55785, 74380, 78099, 104132, 111570, 130165, 156198, 223140, 260330, 312396, 390495, 520660, 780990, 1561980]

約数ペア:

[(1, 1561980), (2, 780990), (3, 520660), (4, 390495), (5, 312396), (6, 260330), (7, 223140), (10, 156198), (12, 130165), (14, 111570), (15, 104132), (20, 78099), (21, 74380), (28, 55785), (30, 52066), (35, 44628), (42, 37190), (60, 26033), (70, 22314), (84, 18595), (105, 14876), (140, 11157), (210, 7438), (420, 3719)]