81437020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3613}}^1$

素因数の和:3659

約数の個数: 72

約数和(自身を含む): 207645984

約数和(自身を除く): 126208964

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 980, 1127, 1610, 2254, 3220, 3613, 4508, 5635, 7226, 11270, 14452, 18065, 22540, 25291, 36130, 50582, 72260, 83099, 101164, 126455, 166198, 177037, 252910, 332396, 354074, 415495, 505820, 581693, 708148, 830990, 885185, 1163386, 1661980, 1770370, 2326772, 2908465, 3540740, 4071851, 5816930, 8143702, 11633860, 16287404, 20359255, 40718510, 81437020]

約数ペア:

[(1, 81437020), (2, 40718510), (4, 20359255), (5, 16287404), (7, 11633860), (10, 8143702), (14, 5816930), (20, 4071851), (23, 3540740), (28, 2908465), (35, 2326772), (46, 1770370), (49, 1661980), (70, 1163386), (92, 885185), (98, 830990), (115, 708148), (140, 581693), (161, 505820), (196, 415495), (230, 354074), (245, 332396), (322, 252910), (460, 177037), (490, 166198), (644, 126455), (805, 101164), (980, 83099), (1127, 72260), (1610, 50582), (2254, 36130), (3220, 25291), (3613, 22540), (4508, 18065), (5635, 14452), (7226, 11270)]