80400820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{2657}}^1$

素因数の和:2772

約数の個数: 48

約数和(自身を含む): 180850320

約数和(自身を除く): 100449500

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 890, 1513, 1780, 2657, 3026, 5314, 6052, 7565, 10628, 13285, 15130, 26570, 30260, 45169, 53140, 90338, 180676, 225845, 236473, 451690, 472946, 903380, 945892, 1182365, 2364730, 4020041, 4729460, 8040082, 16080164, 20100205, 40200410, 80400820]

約数ペア:

[(1, 80400820), (2, 40200410), (4, 20100205), (5, 16080164), (10, 8040082), (17, 4729460), (20, 4020041), (34, 2364730), (68, 1182365), (85, 945892), (89, 903380), (170, 472946), (178, 451690), (340, 236473), (356, 225845), (445, 180676), (890, 90338), (1513, 53140), (1780, 45169), (2657, 30260), (3026, 26570), (5314, 15130), (6052, 13285), (7565, 10628)]