81485420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{443}}^1\times {\mathrm{541}}^1$

素因数の和:1010

約数の個数: 48

約数和(自身を含む): 181929888

約数和(自身を除く): 100444468

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 443, 541, 886, 1082, 1772, 2164, 2215, 2705, 4430, 5410, 7531, 8860, 9197, 10820, 15062, 18394, 30124, 36788, 37655, 45985, 75310, 91970, 150620, 183940, 239663, 479326, 958652, 1198315, 2396630, 4074271, 4793260, 8148542, 16297084, 20371355, 40742710, 81485420]

約数ペア:

[(1, 81485420), (2, 40742710), (4, 20371355), (5, 16297084), (10, 8148542), (17, 4793260), (20, 4074271), (34, 2396630), (68, 1198315), (85, 958652), (170, 479326), (340, 239663), (443, 183940), (541, 150620), (886, 91970), (1082, 75310), (1772, 45985), (2164, 37655), (2215, 36788), (2705, 30124), (4430, 18394), (5410, 15062), (7531, 10820), (8860, 9197)]