21086960

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13873}}^1$

素因数の和:13905

約数の個数: 40

約数和(自身を含む): 51611280

約数和(自身を除く): 30524320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13873, 27746, 55492, 69365, 110984, 138730, 221968, 263587, 277460, 527174, 554920, 1054348, 1109840, 1317935, 2108696, 2635870, 4217392, 5271740, 10543480, 21086960]

約数ペア:

[(1, 21086960), (2, 10543480), (4, 5271740), (5, 4217392), (8, 2635870), (10, 2108696), (16, 1317935), (19, 1109840), (20, 1054348), (38, 554920), (40, 527174), (76, 277460), (80, 263587), (95, 221968), (152, 138730), (190, 110984), (304, 69365), (380, 55492), (760, 27746), (1520, 13873)]