20112680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{659}}^1$

素因数の和:786

約数の個数: 64

約数和(自身を含む): 52272000

約数和(自身を除く): 32159320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 659, 763, 872, 1090, 1318, 1526, 2180, 2636, 3052, 3295, 3815, 4360, 4613, 5272, 6104, 6590, 7630, 9226, 13180, 15260, 18452, 23065, 26360, 30520, 36904, 46130, 71831, 92260, 143662, 184520, 287324, 359155, 502817, 574648, 718310, 1005634, 1436620, 2011268, 2514085, 2873240, 4022536, 5028170, 10056340, 20112680]

約数ペア:

[(1, 20112680), (2, 10056340), (4, 5028170), (5, 4022536), (7, 2873240), (8, 2514085), (10, 2011268), (14, 1436620), (20, 1005634), (28, 718310), (35, 574648), (40, 502817), (56, 359155), (70, 287324), (109, 184520), (140, 143662), (218, 92260), (280, 71831), (436, 46130), (545, 36904), (659, 30520), (763, 26360), (872, 23065), (1090, 18452), (1318, 15260), (1526, 13180), (2180, 9226), (2636, 7630), (3052, 6590), (3295, 6104), (3815, 5272), (4360, 4613)]