18881356

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 39844224

約数和(自身を除く): 20962868

約数列:

[1, 2, 4, 13, 17, 26, 31, 34, 52, 53, 62, 68, 106, 124, 169, 212, 221, 338, 403, 442, 527, 676, 689, 806, 884, 901, 1054, 1378, 1612, 1643, 1802, 2108, 2756, 2873, 3286, 3604, 5239, 5746, 6572, 6851, 8957, 10478, 11492, 11713, 13702, 17914, 20956, 21359, 23426, 27404, 27931, 35828, 42718, 46852, 55862, 85436, 89063, 111724, 152269, 178126, 277667, 304538, 356252, 363103, 555334, 609076, 726206, 1110668, 1452412, 4720339, 9440678, 18881356]

約数ペア:

[(1, 18881356), (2, 9440678), (4, 4720339), (13, 1452412), (17, 1110668), (26, 726206), (31, 609076), (34, 555334), (52, 363103), (53, 356252), (62, 304538), (68, 277667), (106, 178126), (124, 152269), (169, 111724), (212, 89063), (221, 85436), (338, 55862), (403, 46852), (442, 42718), (527, 35828), (676, 27931), (689, 27404), (806, 23426), (884, 21359), (901, 20956), (1054, 17914), (1378, 13702), (1612, 11713), (1643, 11492), (1802, 10478), (2108, 8957), (2756, 6851), (2873, 6572), (3286, 5746), (3604, 5239)]