123969680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{81559}}^1$

素因数の和:81591

約数の個数: 40

約数和(自身を含む): 303403200

約数和(自身を除く): 179433520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 81559, 163118, 326236, 407795, 652472, 815590, 1304944, 1549621, 1631180, 3099242, 3262360, 6198484, 6524720, 7748105, 12396968, 15496210, 24793936, 30992420, 61984840, 123969680]

約数ペア:

[(1, 123969680), (2, 61984840), (4, 30992420), (5, 24793936), (8, 15496210), (10, 12396968), (16, 7748105), (19, 6524720), (20, 6198484), (38, 3262360), (40, 3099242), (76, 1631180), (80, 1549621), (95, 1304944), (152, 815590), (190, 652472), (304, 407795), (380, 326236), (760, 163118), (1520, 81559)]