21399970

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{677}}^1$

素因数の和:822

約数の個数: 32

約数和(自身を含む): 40273200

約数和(自身を除く): 18873230

約数列:

[1, 2, 5, 10, 29, 58, 109, 145, 218, 290, 545, 677, 1090, 1354, 3161, 3385, 6322, 6770, 15805, 19633, 31610, 39266, 73793, 98165, 147586, 196330, 368965, 737930, 2139997, 4279994, 10699985, 21399970]

約数ペア:

[(1, 21399970), (2, 10699985), (5, 4279994), (10, 2139997), (29, 737930), (58, 368965), (109, 196330), (145, 147586), (218, 98165), (290, 73793), (545, 39266), (677, 31610), (1090, 19633), (1354, 15805), (3161, 6770), (3385, 6322)]