128581420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{1429}}^1$

素因数の和:1858

約数の個数: 48

約数和(自身を含む): 295495200

約数和(自身を除く): 166913780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 409, 818, 1429, 1636, 2045, 2858, 4090, 4499, 5716, 7145, 8180, 8998, 14290, 15719, 17996, 22495, 28580, 31438, 44990, 62876, 78595, 89980, 157190, 314380, 584461, 1168922, 2337844, 2922305, 5844610, 6429071, 11689220, 12858142, 25716284, 32145355, 64290710, 128581420]

約数ペア:

[(1, 128581420), (2, 64290710), (4, 32145355), (5, 25716284), (10, 12858142), (11, 11689220), (20, 6429071), (22, 5844610), (44, 2922305), (55, 2337844), (110, 1168922), (220, 584461), (409, 314380), (818, 157190), (1429, 89980), (1636, 78595), (2045, 62876), (2858, 44990), (4090, 31438), (4499, 28580), (5716, 22495), (7145, 17996), (8180, 15719), (8998, 14290)]