21090225

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 38108672

約数和(自身を除く): 17018447

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 97, 195, 223, 291, 325, 485, 669, 975, 1115, 1261, 1455, 2425, 2899, 3345, 3783, 5575, 6305, 7275, 8697, 14495, 16725, 18915, 21631, 31525, 43485, 64893, 72475, 94575, 108155, 217425, 281203, 324465, 540775, 843609, 1406015, 1622325, 4218045, 7030075, 21090225]

約数ペア:

[(1, 21090225), (3, 7030075), (5, 4218045), (13, 1622325), (15, 1406015), (25, 843609), (39, 540775), (65, 324465), (75, 281203), (97, 217425), (195, 108155), (223, 94575), (291, 72475), (325, 64893), (485, 43485), (669, 31525), (975, 21631), (1115, 18915), (1261, 16725), (1455, 14495), (2425, 8697), (2899, 7275), (3345, 6305), (3783, 5575)]