21128684

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{317}}^1\times {\mathrm{877}}^1$

素因数の和:1217

約数の個数: 24

約数和(自身を含む): 39088560

約数和(自身を除く): 17959876

約数列:

[1, 2, 4, 19, 38, 76, 317, 634, 877, 1268, 1754, 3508, 6023, 12046, 16663, 24092, 33326, 66652, 278009, 556018, 1112036, 5282171, 10564342, 21128684]

約数ペア:

[(1, 21128684), (2, 10564342), (4, 5282171), (19, 1112036), (38, 556018), (76, 278009), (317, 66652), (634, 33326), (877, 24092), (1268, 16663), (1754, 12046), (3508, 6023)]