18945640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{953}}^1$

素因数の和:1042

約数の個数: 64

約数和(自身を含む): 49455360

約数和(自身を除く): 30509720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 953, 994, 1420, 1906, 1988, 2485, 2840, 3812, 3976, 4765, 4970, 6671, 7624, 9530, 9940, 13342, 19060, 19880, 26684, 33355, 38120, 53368, 66710, 67663, 133420, 135326, 266840, 270652, 338315, 473641, 541304, 676630, 947282, 1353260, 1894564, 2368205, 2706520, 3789128, 4736410, 9472820, 18945640]

約数ペア:

[(1, 18945640), (2, 9472820), (4, 4736410), (5, 3789128), (7, 2706520), (8, 2368205), (10, 1894564), (14, 1353260), (20, 947282), (28, 676630), (35, 541304), (40, 473641), (56, 338315), (70, 270652), (71, 266840), (140, 135326), (142, 133420), (280, 67663), (284, 66710), (355, 53368), (497, 38120), (568, 33355), (710, 26684), (953, 19880), (994, 19060), (1420, 13342), (1906, 9940), (1988, 9530), (2485, 7624), (2840, 6671), (3812, 4970), (3976, 4765)]