81021220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{557}}^1\times {\mathrm{1039}}^1$

素因数の和:1612

約数の個数: 48

約数和(自身を含む): 194987520

約数和(自身を除く): 113966300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 557, 1039, 1114, 2078, 2228, 2785, 3899, 4156, 5195, 5570, 7273, 7798, 10390, 11140, 14546, 15596, 19495, 20780, 29092, 36365, 38990, 72730, 77980, 145460, 578723, 1157446, 2314892, 2893615, 4051061, 5787230, 8102122, 11574460, 16204244, 20255305, 40510610, 81021220]

約数ペア:

[(1, 81021220), (2, 40510610), (4, 20255305), (5, 16204244), (7, 11574460), (10, 8102122), (14, 5787230), (20, 4051061), (28, 2893615), (35, 2314892), (70, 1157446), (140, 578723), (557, 145460), (1039, 77980), (1114, 72730), (2078, 38990), (2228, 36365), (2785, 29092), (3899, 20780), (4156, 19495), (5195, 15596), (5570, 14546), (7273, 11140), (7798, 10390)]