21506680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{701}}^1$

素因数の和:784

約数の個数: 64

約数和(自身を含む): 53071200

約数和(自身を除く): 31564520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 701, 767, 1180, 1402, 1534, 2360, 2804, 3068, 3505, 3835, 5608, 6136, 7010, 7670, 9113, 14020, 15340, 18226, 28040, 30680, 36452, 41359, 45565, 72904, 82718, 91130, 165436, 182260, 206795, 330872, 364520, 413590, 537667, 827180, 1075334, 1654360, 2150668, 2688335, 4301336, 5376670, 10753340, 21506680]

約数ペア:

[(1, 21506680), (2, 10753340), (4, 5376670), (5, 4301336), (8, 2688335), (10, 2150668), (13, 1654360), (20, 1075334), (26, 827180), (40, 537667), (52, 413590), (59, 364520), (65, 330872), (104, 206795), (118, 182260), (130, 165436), (236, 91130), (260, 82718), (295, 72904), (472, 45565), (520, 41359), (590, 36452), (701, 30680), (767, 28040), (1180, 18226), (1402, 15340), (1534, 14020), (2360, 9113), (2804, 7670), (3068, 7010), (3505, 6136), (3835, 5608)]