81907540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{2203}}^1$

素因数の和:2249

約数の個数: 72

約数和(自身を含む): 203279328

約数和(自身を除く): 121371788

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 169, 220, 260, 286, 338, 572, 676, 715, 845, 1430, 1690, 1859, 2203, 2860, 3380, 3718, 4406, 7436, 8812, 9295, 11015, 18590, 22030, 24233, 28639, 37180, 44060, 48466, 57278, 96932, 114556, 121165, 143195, 242330, 286390, 315029, 372307, 484660, 572780, 630058, 744614, 1260116, 1489228, 1575145, 1861535, 3150290, 3723070, 4095377, 6300580, 7446140, 8190754, 16381508, 20476885, 40953770, 81907540]

約数ペア:

[(1, 81907540), (2, 40953770), (4, 20476885), (5, 16381508), (10, 8190754), (11, 7446140), (13, 6300580), (20, 4095377), (22, 3723070), (26, 3150290), (44, 1861535), (52, 1575145), (55, 1489228), (65, 1260116), (110, 744614), (130, 630058), (143, 572780), (169, 484660), (220, 372307), (260, 315029), (286, 286390), (338, 242330), (572, 143195), (676, 121165), (715, 114556), (845, 96932), (1430, 57278), (1690, 48466), (1859, 44060), (2203, 37180), (2860, 28639), (3380, 24233), (3718, 22030), (4406, 18590), (7436, 11015), (8812, 9295)]