21400535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 29719872

約数和(自身を除く): 8319337

約数列:

[1, 5, 13, 17, 65, 85, 107, 181, 221, 535, 905, 1105, 1391, 1819, 2353, 3077, 6955, 9095, 11765, 15385, 19367, 23647, 40001, 96835, 118235, 200005, 251771, 329239, 1258855, 1646195, 4280107, 21400535]

約数ペア:

[(1, 21400535), (5, 4280107), (13, 1646195), (17, 1258855), (65, 329239), (85, 251771), (107, 200005), (181, 118235), (221, 96835), (535, 40001), (905, 23647), (1105, 19367), (1391, 15385), (1819, 11765), (2353, 9095), (3077, 6955)]