28780780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{1231}}^1$

素因数の和:1414

約数の個数: 48

約数和(自身を含む): 69543936

約数和(自身を除く): 40763156

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 167, 334, 668, 835, 1169, 1231, 1670, 2338, 2462, 3340, 4676, 4924, 5845, 6155, 8617, 11690, 12310, 17234, 23380, 24620, 34468, 43085, 86170, 172340, 205577, 411154, 822308, 1027885, 1439039, 2055770, 2878078, 4111540, 5756156, 7195195, 14390390, 28780780]

約数ペア:

[(1, 28780780), (2, 14390390), (4, 7195195), (5, 5756156), (7, 4111540), (10, 2878078), (14, 2055770), (20, 1439039), (28, 1027885), (35, 822308), (70, 411154), (140, 205577), (167, 172340), (334, 86170), (668, 43085), (835, 34468), (1169, 24620), (1231, 23380), (1670, 17234), (2338, 12310), (2462, 11690), (3340, 8617), (4676, 6155), (4924, 5845)]