18913720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2179}}^1$

素因数の和:2228

約数の個数: 64

約数和(自身を含む): 50227200

約数和(自身を除く): 31313480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2179, 4340, 4358, 8680, 8716, 10895, 15253, 17432, 21790, 30506, 43580, 61012, 67549, 76265, 87160, 122024, 135098, 152530, 270196, 305060, 337745, 472843, 540392, 610120, 675490, 945686, 1350980, 1891372, 2364215, 2701960, 3782744, 4728430, 9456860, 18913720]

約数ペア:

[(1, 18913720), (2, 9456860), (4, 4728430), (5, 3782744), (7, 2701960), (8, 2364215), (10, 1891372), (14, 1350980), (20, 945686), (28, 675490), (31, 610120), (35, 540392), (40, 472843), (56, 337745), (62, 305060), (70, 270196), (124, 152530), (140, 135098), (155, 122024), (217, 87160), (248, 76265), (280, 67549), (310, 61012), (434, 43580), (620, 30506), (868, 21790), (1085, 17432), (1240, 15253), (1736, 10895), (2170, 8716), (2179, 8680), (4340, 4358)]