21417825

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2034

約数の個数: 48

約数和(自身を含む): 41622336

約数和(自身を除く): 20204511

約数列:

[1, 3, 5, 11, 13, 15, 25, 33, 39, 55, 65, 75, 143, 165, 195, 275, 325, 429, 715, 825, 975, 1997, 2145, 3575, 5991, 9985, 10725, 21967, 25961, 29955, 49925, 65901, 77883, 109835, 129805, 149775, 285571, 329505, 389415, 549175, 649025, 856713, 1427855, 1647525, 1947075, 4283565, 7139275, 21417825]

約数ペア:

[(1, 21417825), (3, 7139275), (5, 4283565), (11, 1947075), (13, 1647525), (15, 1427855), (25, 856713), (33, 649025), (39, 549175), (55, 389415), (65, 329505), (75, 285571), (143, 149775), (165, 129805), (195, 109835), (275, 77883), (325, 65901), (429, 49925), (715, 29955), (825, 25961), (975, 21967), (1997, 10725), (2145, 9985), (3575, 5991)]