21913528

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{971}}^1$

素因数の和:1028

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 30341192

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 31, 52, 56, 62, 91, 104, 124, 182, 217, 248, 364, 403, 434, 728, 806, 868, 971, 1612, 1736, 1942, 2821, 3224, 3884, 5642, 6797, 7768, 11284, 12623, 13594, 22568, 25246, 27188, 30101, 50492, 54376, 60202, 88361, 100984, 120404, 176722, 210707, 240808, 353444, 391313, 421414, 706888, 782626, 842828, 1565252, 1685656, 2739191, 3130504, 5478382, 10956764, 21913528]

約数ペア:

[(1, 21913528), (2, 10956764), (4, 5478382), (7, 3130504), (8, 2739191), (13, 1685656), (14, 1565252), (26, 842828), (28, 782626), (31, 706888), (52, 421414), (56, 391313), (62, 353444), (91, 240808), (104, 210707), (124, 176722), (182, 120404), (217, 100984), (248, 88361), (364, 60202), (403, 54376), (434, 50492), (728, 30101), (806, 27188), (868, 25246), (971, 22568), (1612, 13594), (1736, 12623), (1942, 11284), (2821, 7768), (3224, 6797), (3884, 5642)]