21123245

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{953}}^1$

素因数の和:1013

約数の個数: 32

約数和(自身を含む): 30772224

約数和(自身を除く): 9648979

約数列:

[1, 5, 11, 13, 31, 55, 65, 143, 155, 341, 403, 715, 953, 1705, 2015, 4433, 4765, 10483, 12389, 22165, 29543, 52415, 61945, 136279, 147715, 324973, 384059, 681395, 1624865, 1920295, 4224649, 21123245]

約数ペア:

[(1, 21123245), (5, 4224649), (11, 1920295), (13, 1624865), (31, 681395), (55, 384059), (65, 324973), (143, 147715), (155, 136279), (341, 61945), (403, 52415), (715, 29543), (953, 22165), (1705, 12389), (2015, 10483), (4433, 4765)]