21271792

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{419}}^1$

素因数の和:613

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22475408

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 167, 304, 334, 419, 668, 838, 1336, 1676, 2672, 3173, 3352, 6346, 6704, 7961, 12692, 15922, 25384, 31844, 50768, 63688, 69973, 127376, 139946, 279892, 559784, 1119568, 1329487, 2658974, 5317948, 10635896, 21271792]

約数ペア:

[(1, 21271792), (2, 10635896), (4, 5317948), (8, 2658974), (16, 1329487), (19, 1119568), (38, 559784), (76, 279892), (152, 139946), (167, 127376), (304, 69973), (334, 63688), (419, 50768), (668, 31844), (838, 25384), (1336, 15922), (1676, 12692), (2672, 7961), (3173, 6704), (3352, 6346)]