21995212

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:450

約数の個数: 36

約数和(自身を含む): 41776560

約数和(自身を除く): 19781348

約数列:

[1, 2, 4, 17, 34, 53, 68, 106, 212, 289, 359, 578, 718, 901, 1156, 1436, 1802, 3604, 6103, 12206, 15317, 19027, 24412, 30634, 38054, 61268, 76108, 103751, 207502, 323459, 415004, 646918, 1293836, 5498803, 10997606, 21995212]

約数ペア:

[(1, 21995212), (2, 10997606), (4, 5498803), (17, 1293836), (34, 646918), (53, 415004), (68, 323459), (106, 207502), (212, 103751), (289, 76108), (359, 61268), (578, 38054), (718, 30634), (901, 24412), (1156, 19027), (1436, 15317), (1802, 12206), (3604, 6103)]