21357520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14051}}^1$

素因数の和:14083

約数の個数: 40

約数和(自身を含む): 52273440

約数和(自身を除く): 30915920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14051, 28102, 56204, 70255, 112408, 140510, 224816, 266969, 281020, 533938, 562040, 1067876, 1124080, 1334845, 2135752, 2669690, 4271504, 5339380, 10678760, 21357520]

約数ペア:

[(1, 21357520), (2, 10678760), (4, 5339380), (5, 4271504), (8, 2669690), (10, 2135752), (16, 1334845), (19, 1124080), (20, 1067876), (38, 562040), (40, 533938), (76, 281020), (80, 266969), (95, 224816), (152, 140510), (190, 112408), (304, 70255), (380, 56204), (760, 28102), (1520, 14051)]