21445740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{283}}^1\times {\mathrm{421}}^1$

素因数の和:719

約数の個数: 72

約数和(自身を含む): 65437008

約数和(自身を除く): 43991268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 283, 421, 566, 842, 849, 1132, 1263, 1415, 1684, 1698, 2105, 2526, 2547, 2830, 3396, 3789, 4210, 4245, 5052, 5094, 5660, 6315, 7578, 8420, 8490, 10188, 12630, 12735, 15156, 16980, 18945, 25260, 25470, 37890, 50940, 75780, 119143, 238286, 357429, 476572, 595715, 714858, 1072287, 1191430, 1429716, 1787145, 2144574, 2382860, 3574290, 4289148, 5361435, 7148580, 10722870, 21445740]

約数ペア:

[(1, 21445740), (2, 10722870), (3, 7148580), (4, 5361435), (5, 4289148), (6, 3574290), (9, 2382860), (10, 2144574), (12, 1787145), (15, 1429716), (18, 1191430), (20, 1072287), (30, 714858), (36, 595715), (45, 476572), (60, 357429), (90, 238286), (180, 119143), (283, 75780), (421, 50940), (566, 37890), (842, 25470), (849, 25260), (1132, 18945), (1263, 16980), (1415, 15156), (1684, 12735), (1698, 12630), (2105, 10188), (2526, 8490), (2547, 8420), (2830, 7578), (3396, 6315), (3789, 5660), (4210, 5094), (4245, 5052)]