80437420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{389}}^1$

素因数の和:623

約数の個数: 72

約数和(自身を含む): 197935920

約数和(自身を除く): 117498500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 211, 245, 389, 422, 490, 778, 844, 980, 1055, 1477, 1556, 1945, 2110, 2723, 2954, 3890, 4220, 5446, 5908, 7385, 7780, 10339, 10892, 13615, 14770, 19061, 20678, 27230, 29540, 38122, 41356, 51695, 54460, 76244, 82079, 95305, 103390, 164158, 190610, 206780, 328316, 381220, 410395, 574553, 820790, 1149106, 1641580, 2298212, 2872765, 4021871, 5745530, 8043742, 11491060, 16087484, 20109355, 40218710, 80437420]

約数ペア:

[(1, 80437420), (2, 40218710), (4, 20109355), (5, 16087484), (7, 11491060), (10, 8043742), (14, 5745530), (20, 4021871), (28, 2872765), (35, 2298212), (49, 1641580), (70, 1149106), (98, 820790), (140, 574553), (196, 410395), (211, 381220), (245, 328316), (389, 206780), (422, 190610), (490, 164158), (778, 103390), (844, 95305), (980, 82079), (1055, 76244), (1477, 54460), (1556, 51695), (1945, 41356), (2110, 38122), (2723, 29540), (2954, 27230), (3890, 20678), (4220, 19061), (5446, 14770), (5908, 13615), (7385, 10892), (7780, 10339)]