18684640

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{691}}^1$

素因数の和:732

約数の個数: 72

約数和(自身を含む): 47868408

約数和(自身を除く): 29183768

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 169, 208, 260, 338, 416, 520, 676, 691, 845, 1040, 1352, 1382, 1690, 2080, 2704, 2764, 3380, 3455, 5408, 5528, 6760, 6910, 8983, 11056, 13520, 13820, 17966, 22112, 27040, 27640, 35932, 44915, 55280, 71864, 89830, 110560, 116779, 143728, 179660, 233558, 287456, 359320, 467116, 583895, 718640, 934232, 1167790, 1437280, 1868464, 2335580, 3736928, 4671160, 9342320, 18684640]

約数ペア:

[(1, 18684640), (2, 9342320), (4, 4671160), (5, 3736928), (8, 2335580), (10, 1868464), (13, 1437280), (16, 1167790), (20, 934232), (26, 718640), (32, 583895), (40, 467116), (52, 359320), (65, 287456), (80, 233558), (104, 179660), (130, 143728), (160, 116779), (169, 110560), (208, 89830), (260, 71864), (338, 55280), (416, 44915), (520, 35932), (676, 27640), (691, 27040), (845, 22112), (1040, 17966), (1352, 13820), (1382, 13520), (1690, 11056), (2080, 8983), (2704, 6910), (2764, 6760), (3380, 5528), (3455, 5408)]