21327520

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7841}}^1$

素因数の和:7873

約数の個数: 48

約数和(自身を含む): 53356968

約数和(自身を除く): 32029448

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7841, 15682, 31364, 39205, 62728, 78410, 125456, 133297, 156820, 250912, 266594, 313640, 533188, 627280, 666485, 1066376, 1254560, 1332970, 2132752, 2665940, 4265504, 5331880, 10663760, 21327520]

約数ペア:

[(1, 21327520), (2, 10663760), (4, 5331880), (5, 4265504), (8, 2665940), (10, 2132752), (16, 1332970), (17, 1254560), (20, 1066376), (32, 666485), (34, 627280), (40, 533188), (68, 313640), (80, 266594), (85, 250912), (136, 156820), (160, 133297), (170, 125456), (272, 78410), (340, 62728), (544, 39205), (680, 31364), (1360, 15682), (2720, 7841)]