65801720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40123}}^1$

素因数の和:40175

約数の個数: 32

約数和(自身を含む): 151668720

約数和(自身を除く): 85867000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40123, 80246, 160492, 200615, 320984, 401230, 802460, 1604920, 1645043, 3290086, 6580172, 8225215, 13160344, 16450430, 32900860, 65801720]

約数ペア:

[(1, 65801720), (2, 32900860), (4, 16450430), (5, 13160344), (8, 8225215), (10, 6580172), (20, 3290086), (40, 1645043), (41, 1604920), (82, 802460), (164, 401230), (205, 320984), (328, 200615), (410, 160492), (820, 80246), (1640, 40123)]