21881008

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{431}}^1$

素因数の和:625

約数の個数: 40

約数和(自身を含む): 44997120

約数和(自身を除く): 23116112

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 167, 304, 334, 431, 668, 862, 1336, 1724, 2672, 3173, 3448, 6346, 6896, 8189, 12692, 16378, 25384, 32756, 50768, 65512, 71977, 131024, 143954, 287908, 575816, 1151632, 1367563, 2735126, 5470252, 10940504, 21881008]

約数ペア:

[(1, 21881008), (2, 10940504), (4, 5470252), (8, 2735126), (16, 1367563), (19, 1151632), (38, 575816), (76, 287908), (152, 143954), (167, 131024), (304, 71977), (334, 65512), (431, 50768), (668, 32756), (862, 25384), (1336, 16378), (1724, 12692), (2672, 8189), (3173, 6896), (3448, 6346)]