399888916

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1\times {\mathrm{911}}^1$

素因数の和:1240

約数の個数: 48

約数和(自身を含む): 816947712

約数和(自身を除く): 417058796

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 257, 427, 514, 854, 911, 1028, 1708, 1799, 1822, 3598, 3644, 6377, 7196, 12754, 15677, 25508, 31354, 55571, 62708, 109739, 111142, 219478, 222284, 234127, 388997, 438956, 468254, 777994, 936508, 1555988, 1638889, 3277778, 6555556, 14281747, 28563494, 57126988, 99972229, 199944458, 399888916]

約数ペア:

[(1, 399888916), (2, 199944458), (4, 99972229), (7, 57126988), (14, 28563494), (28, 14281747), (61, 6555556), (122, 3277778), (244, 1638889), (257, 1555988), (427, 936508), (514, 777994), (854, 468254), (911, 438956), (1028, 388997), (1708, 234127), (1799, 222284), (1822, 219478), (3598, 111142), (3644, 109739), (6377, 62708), (7196, 55571), (12754, 31354), (15677, 25508)]