128864820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{306821}}^1$

素因数の和:306840

約数の個数: 48

約数和(自身を含む): 412368768

約数和(自身を除く): 283503948

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 306821, 613642, 920463, 1227284, 1534105, 1840926, 2147747, 3068210, 3681852, 4295494, 4602315, 6136420, 6443241, 8590988, 9204630, 10738735, 12886482, 18409260, 21477470, 25772964, 32216205, 42954940, 64432410, 128864820]

約数ペア:

[(1, 128864820), (2, 64432410), (3, 42954940), (4, 32216205), (5, 25772964), (6, 21477470), (7, 18409260), (10, 12886482), (12, 10738735), (14, 9204630), (15, 8590988), (20, 6443241), (21, 6136420), (28, 4602315), (30, 4295494), (35, 3681852), (42, 3068210), (60, 2147747), (70, 1840926), (84, 1534105), (105, 1227284), (140, 920463), (210, 613642), (420, 306821)]