20444240

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{271}}^1$

素因数の和:348

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30552496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 41, 46, 80, 82, 92, 115, 164, 184, 205, 230, 271, 328, 368, 410, 460, 542, 656, 820, 920, 943, 1084, 1355, 1640, 1840, 1886, 2168, 2710, 3280, 3772, 4336, 4715, 5420, 6233, 7544, 9430, 10840, 11111, 12466, 15088, 18860, 21680, 22222, 24932, 31165, 37720, 44444, 49864, 55555, 62330, 75440, 88888, 99728, 111110, 124660, 177776, 222220, 249320, 255553, 444440, 498640, 511106, 888880, 1022212, 1277765, 2044424, 2555530, 4088848, 5111060, 10222120, 20444240]

約数ペア:

[(1, 20444240), (2, 10222120), (4, 5111060), (5, 4088848), (8, 2555530), (10, 2044424), (16, 1277765), (20, 1022212), (23, 888880), (40, 511106), (41, 498640), (46, 444440), (80, 255553), (82, 249320), (92, 222220), (115, 177776), (164, 124660), (184, 111110), (205, 99728), (230, 88888), (271, 75440), (328, 62330), (368, 55555), (410, 49864), (460, 44444), (542, 37720), (656, 31165), (820, 24932), (920, 22222), (943, 21680), (1084, 18860), (1355, 15088), (1640, 12466), (1840, 11111), (1886, 10840), (2168, 9430), (2710, 7544), (3280, 6233), (3772, 5420), (4336, 4715)]