18728216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 40346880

約数和(自身を除く): 21618664

約数列:

[1, 2, 4, 8, 13, 26, 31, 37, 52, 62, 74, 104, 124, 148, 157, 248, 296, 314, 403, 481, 628, 806, 962, 1147, 1256, 1612, 1924, 2041, 2294, 3224, 3848, 4082, 4588, 4867, 5809, 8164, 9176, 9734, 11618, 14911, 16328, 19468, 23236, 29822, 38936, 46472, 59644, 63271, 75517, 119288, 126542, 151034, 180079, 253084, 302068, 360158, 506168, 604136, 720316, 1440632, 2341027, 4682054, 9364108, 18728216]

約数ペア:

[(1, 18728216), (2, 9364108), (4, 4682054), (8, 2341027), (13, 1440632), (26, 720316), (31, 604136), (37, 506168), (52, 360158), (62, 302068), (74, 253084), (104, 180079), (124, 151034), (148, 126542), (157, 119288), (248, 75517), (296, 63271), (314, 59644), (403, 46472), (481, 38936), (628, 29822), (806, 23236), (962, 19468), (1147, 16328), (1256, 14911), (1612, 11618), (1924, 9734), (2041, 9176), (2294, 8164), (3224, 5809), (3848, 4867), (4082, 4588)]