21171915

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{5059}}^1$

素因数の和:5104

約数の個数: 32

約数和(自身を含む): 38860800

約数和(自身を除く): 17688885

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 93, 135, 155, 279, 465, 837, 1395, 4185, 5059, 15177, 25295, 45531, 75885, 136593, 156829, 227655, 470487, 682965, 784145, 1411461, 2352435, 4234383, 7057305, 21171915]

約数ペア:

[(1, 21171915), (3, 7057305), (5, 4234383), (9, 2352435), (15, 1411461), (27, 784145), (31, 682965), (45, 470487), (93, 227655), (135, 156829), (155, 136593), (279, 75885), (465, 45531), (837, 25295), (1395, 15177), (4185, 5059)]