20968180

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{577}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 46609920

約数和(自身を除く): 25641740

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 79, 92, 115, 158, 230, 316, 395, 460, 577, 790, 1154, 1580, 1817, 2308, 2885, 3634, 5770, 7268, 9085, 11540, 13271, 18170, 26542, 36340, 45583, 53084, 66355, 91166, 132710, 182332, 227915, 265420, 455830, 911660, 1048409, 2096818, 4193636, 5242045, 10484090, 20968180]

約数ペア:

[(1, 20968180), (2, 10484090), (4, 5242045), (5, 4193636), (10, 2096818), (20, 1048409), (23, 911660), (46, 455830), (79, 265420), (92, 227915), (115, 182332), (158, 132710), (230, 91166), (316, 66355), (395, 53084), (460, 45583), (577, 36340), (790, 26542), (1154, 18170), (1580, 13271), (1817, 11540), (2308, 9085), (2885, 7268), (3634, 5770)]