21145535

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 28200960

約数和(自身を除く): 7055425

約数列:

[1, 5, 17, 47, 67, 79, 85, 235, 335, 395, 799, 1139, 1343, 3149, 3713, 3995, 5293, 5695, 6715, 15745, 18565, 26465, 53533, 63121, 89981, 248771, 267665, 315605, 449905, 1243855, 4229107, 21145535]

約数ペア:

[(1, 21145535), (5, 4229107), (17, 1243855), (47, 449905), (67, 315605), (79, 267665), (85, 248771), (235, 89981), (335, 63121), (395, 53533), (799, 26465), (1139, 18565), (1343, 15745), (3149, 6715), (3713, 5695), (3995, 5293)]