21681392

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1009}}^1$

素因数の和:1113

約数の個数: 40

約数和(自身を含む): 45086400

約数和(自身を除く): 23405008

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 1009, 1264, 1343, 2018, 2686, 4036, 5372, 8072, 10744, 16144, 17153, 21488, 34306, 68612, 79711, 137224, 159422, 274448, 318844, 637688, 1275376, 1355087, 2710174, 5420348, 10840696, 21681392]

約数ペア:

[(1, 21681392), (2, 10840696), (4, 5420348), (8, 2710174), (16, 1355087), (17, 1275376), (34, 637688), (68, 318844), (79, 274448), (136, 159422), (158, 137224), (272, 79711), (316, 68612), (632, 34306), (1009, 21488), (1264, 17153), (1343, 16144), (2018, 10744), (2686, 8072), (4036, 5372)]