11990980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 26256384

約数和(自身を除く): 14265404

約数列:

[1, 2, 4, 5, 10, 20, 43, 73, 86, 146, 172, 191, 215, 292, 365, 382, 430, 730, 764, 860, 955, 1460, 1910, 3139, 3820, 6278, 8213, 12556, 13943, 15695, 16426, 27886, 31390, 32852, 41065, 55772, 62780, 69715, 82130, 139430, 164260, 278860, 599549, 1199098, 2398196, 2997745, 5995490, 11990980]

約数ペア:

[(1, 11990980), (2, 5995490), (4, 2997745), (5, 2398196), (10, 1199098), (20, 599549), (43, 278860), (73, 164260), (86, 139430), (146, 82130), (172, 69715), (191, 62780), (215, 55772), (292, 41065), (365, 32852), (382, 31390), (430, 27886), (730, 16426), (764, 15695), (860, 13943), (955, 12556), (1460, 8213), (1910, 6278), (3139, 3820)]