21732020

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{421}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 47854800

約数和(自身を除く): 26122780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 89, 116, 145, 178, 290, 356, 421, 445, 580, 842, 890, 1684, 1780, 2105, 2581, 4210, 5162, 8420, 10324, 12209, 12905, 24418, 25810, 37469, 48836, 51620, 61045, 74938, 122090, 149876, 187345, 244180, 374690, 749380, 1086601, 2173202, 4346404, 5433005, 10866010, 21732020]

約数ペア:

[(1, 21732020), (2, 10866010), (4, 5433005), (5, 4346404), (10, 2173202), (20, 1086601), (29, 749380), (58, 374690), (89, 244180), (116, 187345), (145, 149876), (178, 122090), (290, 74938), (356, 61045), (421, 51620), (445, 48836), (580, 37469), (842, 25810), (890, 24418), (1684, 12905), (1780, 12209), (2105, 10324), (2581, 8420), (4210, 5162)]