68686640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:990

約数の個数: 80

約数和(自身を含む): 176372640

約数和(自身を除く): 107686000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 89, 110, 176, 178, 220, 356, 440, 445, 712, 877, 880, 890, 979, 1424, 1754, 1780, 1958, 3508, 3560, 3916, 4385, 4895, 7016, 7120, 7832, 8770, 9647, 9790, 14032, 15664, 17540, 19294, 19580, 35080, 38588, 39160, 48235, 70160, 77176, 78053, 78320, 96470, 154352, 156106, 192940, 312212, 385880, 390265, 624424, 771760, 780530, 858583, 1248848, 1561060, 1717166, 3122120, 3434332, 4292915, 6244240, 6868664, 8585830, 13737328, 17171660, 34343320, 68686640]

約数ペア:

[(1, 68686640), (2, 34343320), (4, 17171660), (5, 13737328), (8, 8585830), (10, 6868664), (11, 6244240), (16, 4292915), (20, 3434332), (22, 3122120), (40, 1717166), (44, 1561060), (55, 1248848), (80, 858583), (88, 780530), (89, 771760), (110, 624424), (176, 390265), (178, 385880), (220, 312212), (356, 192940), (440, 156106), (445, 154352), (712, 96470), (877, 78320), (880, 78053), (890, 77176), (979, 70160), (1424, 48235), (1754, 39160), (1780, 38588), (1958, 35080), (3508, 19580), (3560, 19294), (3916, 17540), (4385, 15664), (4895, 14032), (7016, 9790), (7120, 9647), (7832, 8770)]