12978104080

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1606201}}^1$

素因数の和:1606315

約数の個数: 40

約数和(自身を含む): 30472864344

約数和(自身を除く): 17494760264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 4040, 8080, 1606201, 3212402, 6424804, 8031005, 12849608, 16062010, 25699216, 32124020, 64248040, 128496080, 162226301, 324452602, 648905204, 811131505, 1297810408, 1622263010, 2595620816, 3244526020, 6489052040, 12978104080]

約数ペア:

[(1, 12978104080), (2, 6489052040), (4, 3244526020), (5, 2595620816), (8, 1622263010), (10, 1297810408), (16, 811131505), (20, 648905204), (40, 324452602), (80, 162226301), (101, 128496080), (202, 64248040), (404, 32124020), (505, 25699216), (808, 16062010), (1010, 12849608), (1616, 8031005), (2020, 6424804), (4040, 3212402), (8080, 1606201)]