989420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{811}}^1$

素因数の和:881

約数の個数: 24

約数和(自身を含む): 2114448

約数和(自身を除く): 1125028

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 811, 1220, 1622, 3244, 4055, 8110, 16220, 49471, 98942, 197884, 247355, 494710, 989420]

約数ペア:

[(1, 989420), (2, 494710), (4, 247355), (5, 197884), (10, 98942), (20, 49471), (61, 16220), (122, 8110), (244, 4055), (305, 3244), (610, 1622), (811, 1220)]