21387632

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:318

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 30037648

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 47, 56, 68, 94, 112, 119, 136, 188, 238, 239, 272, 329, 376, 476, 478, 658, 752, 799, 952, 956, 1316, 1598, 1673, 1904, 1912, 2632, 3196, 3346, 3824, 4063, 5264, 5593, 6392, 6692, 8126, 11186, 11233, 12784, 13384, 16252, 22372, 22466, 26768, 28441, 32504, 44744, 44932, 56882, 65008, 78631, 89488, 89864, 113764, 157262, 179728, 190961, 227528, 314524, 381922, 455056, 629048, 763844, 1258096, 1336727, 1527688, 2673454, 3055376, 5346908, 10693816, 21387632]

約数ペア:

[(1, 21387632), (2, 10693816), (4, 5346908), (7, 3055376), (8, 2673454), (14, 1527688), (16, 1336727), (17, 1258096), (28, 763844), (34, 629048), (47, 455056), (56, 381922), (68, 314524), (94, 227528), (112, 190961), (119, 179728), (136, 157262), (188, 113764), (238, 89864), (239, 89488), (272, 78631), (329, 65008), (376, 56882), (476, 44932), (478, 44744), (658, 32504), (752, 28441), (799, 26768), (952, 22466), (956, 22372), (1316, 16252), (1598, 13384), (1673, 12784), (1904, 11233), (1912, 11186), (2632, 8126), (3196, 6692), (3346, 6392), (3824, 5593), (4063, 5264)]