18712820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1831}}^1$

素因数の和:1920

約数の個数: 48

約数和(自身を含む): 45550848

約数和(自身を除く): 26838028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 1831, 2044, 2555, 3662, 5110, 7324, 9155, 10220, 12817, 18310, 25634, 36620, 51268, 64085, 128170, 133663, 256340, 267326, 534652, 668315, 935641, 1336630, 1871282, 2673260, 3742564, 4678205, 9356410, 18712820]

約数ペア:

[(1, 18712820), (2, 9356410), (4, 4678205), (5, 3742564), (7, 2673260), (10, 1871282), (14, 1336630), (20, 935641), (28, 668315), (35, 534652), (70, 267326), (73, 256340), (140, 133663), (146, 128170), (292, 64085), (365, 51268), (511, 36620), (730, 25634), (1022, 18310), (1460, 12817), (1831, 10220), (2044, 9155), (2555, 7324), (3662, 5110)]