16864940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 36789984

約数和(自身を除く): 19925044

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 131, 157, 164, 205, 262, 314, 410, 524, 628, 655, 785, 820, 1310, 1570, 2620, 3140, 5371, 6437, 10742, 12874, 20567, 21484, 25748, 26855, 32185, 41134, 53710, 64370, 82268, 102835, 107420, 128740, 205670, 411340, 843247, 1686494, 3372988, 4216235, 8432470, 16864940]

約数ペア:

[(1, 16864940), (2, 8432470), (4, 4216235), (5, 3372988), (10, 1686494), (20, 843247), (41, 411340), (82, 205670), (131, 128740), (157, 107420), (164, 102835), (205, 82268), (262, 64370), (314, 53710), (410, 41134), (524, 32185), (628, 26855), (655, 25748), (785, 21484), (820, 20567), (1310, 12874), (1570, 10742), (2620, 6437), (3140, 5371)]