21221290

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1831}}^1$

素因数の和:1918

約数の個数: 32

約数和(自身を含む): 40890240

約数和(自身を除く): 19668950

約数列:

[1, 2, 5, 10, 19, 38, 61, 95, 122, 190, 305, 610, 1159, 1831, 2318, 3662, 5795, 9155, 11590, 18310, 34789, 69578, 111691, 173945, 223382, 347890, 558455, 1116910, 2122129, 4244258, 10610645, 21221290]

約数ペア:

[(1, 21221290), (2, 10610645), (5, 4244258), (10, 2122129), (19, 1116910), (38, 558455), (61, 347890), (95, 223382), (122, 173945), (190, 111691), (305, 69578), (610, 34789), (1159, 18310), (1831, 11590), (2318, 9155), (3662, 5795)]