21396081

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{821}}^1$

素因数の和:921

約数の個数: 32

約数和(自身を含む): 35036928

約数和(自身を除く): 13640847

約数列:

[1, 3, 7, 17, 21, 51, 73, 119, 219, 357, 511, 821, 1241, 1533, 2463, 3723, 5747, 8687, 13957, 17241, 26061, 41871, 59933, 97699, 179799, 293097, 419531, 1018861, 1258593, 3056583, 7132027, 21396081]

約数ペア:

[(1, 21396081), (3, 7132027), (7, 3056583), (17, 1258593), (21, 1018861), (51, 419531), (73, 293097), (119, 179799), (219, 97699), (357, 59933), (511, 41871), (821, 26061), (1241, 17241), (1533, 13957), (2463, 8687), (3723, 5747)]