20318640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2731}}^1$

素因数の和:2778

約数の個数: 80

約数和(自身を含む): 65043456

約数和(自身を除く): 44724816

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 48, 60, 62, 80, 93, 120, 124, 155, 186, 240, 248, 310, 372, 465, 496, 620, 744, 930, 1240, 1488, 1860, 2480, 2731, 3720, 5462, 7440, 8193, 10924, 13655, 16386, 21848, 27310, 32772, 40965, 43696, 54620, 65544, 81930, 84661, 109240, 131088, 163860, 169322, 218480, 253983, 327720, 338644, 423305, 507966, 655440, 677288, 846610, 1015932, 1269915, 1354576, 1693220, 2031864, 2539830, 3386440, 4063728, 5079660, 6772880, 10159320, 20318640]

約数ペア:

[(1, 20318640), (2, 10159320), (3, 6772880), (4, 5079660), (5, 4063728), (6, 3386440), (8, 2539830), (10, 2031864), (12, 1693220), (15, 1354576), (16, 1269915), (20, 1015932), (24, 846610), (30, 677288), (31, 655440), (40, 507966), (48, 423305), (60, 338644), (62, 327720), (80, 253983), (93, 218480), (120, 169322), (124, 163860), (155, 131088), (186, 109240), (240, 84661), (248, 81930), (310, 65544), (372, 54620), (465, 43696), (496, 40965), (620, 32772), (744, 27310), (930, 21848), (1240, 16386), (1488, 13655), (1860, 10924), (2480, 8193), (2731, 7440), (3720, 5462)]