29976980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1531}}^1$

素因数の和:1640

約数の個数: 48

約数和(自身を含む): 69491520

約数和(自身を除く): 39514540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1531, 1780, 1958, 3062, 3916, 4895, 6124, 7655, 9790, 15310, 16841, 19580, 30620, 33682, 67364, 84205, 136259, 168410, 272518, 336820, 545036, 681295, 1362590, 1498849, 2725180, 2997698, 5995396, 7494245, 14988490, 29976980]

約数ペア:

[(1, 29976980), (2, 14988490), (4, 7494245), (5, 5995396), (10, 2997698), (11, 2725180), (20, 1498849), (22, 1362590), (44, 681295), (55, 545036), (89, 336820), (110, 272518), (178, 168410), (220, 136259), (356, 84205), (445, 67364), (890, 33682), (979, 30620), (1531, 19580), (1780, 16841), (1958, 15310), (3062, 9790), (3916, 7655), (4895, 6124)]