21405590

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{997}}^1$

素因数の和:1136

約数の個数: 32

約数和(自身を含む): 40957920

約数和(自身を除く): 19552330

約数列:

[1, 2, 5, 10, 19, 38, 95, 113, 190, 226, 565, 997, 1130, 1994, 2147, 4294, 4985, 9970, 10735, 18943, 21470, 37886, 94715, 112661, 189430, 225322, 563305, 1126610, 2140559, 4281118, 10702795, 21405590]

約数ペア:

[(1, 21405590), (2, 10702795), (5, 4281118), (10, 2140559), (19, 1126610), (38, 563305), (95, 225322), (113, 189430), (190, 112661), (226, 94715), (565, 37886), (997, 21470), (1130, 18943), (1994, 10735), (2147, 9970), (4294, 4985)]