81187580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{2683}}^1$

素因数の和:2798

約数の個数: 48

約数和(自身を含む): 182619360

約数和(自身を除く): 101431780

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 890, 1513, 1780, 2683, 3026, 5366, 6052, 7565, 10732, 13415, 15130, 26830, 30260, 45611, 53660, 91222, 182444, 228055, 238787, 456110, 477574, 912220, 955148, 1193935, 2387870, 4059379, 4775740, 8118758, 16237516, 20296895, 40593790, 81187580]

約数ペア:

[(1, 81187580), (2, 40593790), (4, 20296895), (5, 16237516), (10, 8118758), (17, 4775740), (20, 4059379), (34, 2387870), (68, 1193935), (85, 955148), (89, 912220), (170, 477574), (178, 456110), (340, 238787), (356, 228055), (445, 182444), (890, 91222), (1513, 53660), (1780, 45611), (2683, 30260), (3026, 26830), (5366, 15130), (6052, 13415), (7565, 10732)]