21174520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31139}}^1$

素因数の和:31167

約数の個数: 32

約数和(自身を含む): 50446800

約数和(自身を除く): 29272280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31139, 62278, 124556, 155695, 249112, 311390, 529363, 622780, 1058726, 1245560, 2117452, 2646815, 4234904, 5293630, 10587260, 21174520]

約数ペア:

[(1, 21174520), (2, 10587260), (4, 5293630), (5, 4234904), (8, 2646815), (10, 2117452), (17, 1245560), (20, 1058726), (34, 622780), (40, 529363), (68, 311390), (85, 249112), (136, 155695), (170, 124556), (340, 62278), (680, 31139)]