21616315

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 31021056

約数和(自身を除く): 9404741

約数列:

[1, 5, 7, 35, 43, 53, 215, 265, 271, 301, 371, 1355, 1505, 1855, 1897, 2279, 9485, 11395, 11653, 14363, 15953, 58265, 71815, 79765, 81571, 100541, 407855, 502705, 617609, 3088045, 4323263, 21616315]

約数ペア:

[(1, 21616315), (5, 4323263), (7, 3088045), (35, 617609), (43, 502705), (53, 407855), (215, 100541), (265, 81571), (271, 79765), (301, 71815), (371, 58265), (1355, 15953), (1505, 14363), (1855, 11653), (1897, 11395), (2279, 9485)]