21687376

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1123}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 45157824

約数和(自身を除く): 23470448

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 71, 136, 142, 272, 284, 568, 1123, 1136, 1207, 2246, 2414, 4492, 4828, 8984, 9656, 17968, 19091, 19312, 38182, 76364, 79733, 152728, 159466, 305456, 318932, 637864, 1275728, 1355461, 2710922, 5421844, 10843688, 21687376]

約数ペア:

[(1, 21687376), (2, 10843688), (4, 5421844), (8, 2710922), (16, 1355461), (17, 1275728), (34, 637864), (68, 318932), (71, 305456), (136, 159466), (142, 152728), (272, 79733), (284, 76364), (568, 38182), (1123, 19312), (1136, 19091), (1207, 17968), (2246, 9656), (2414, 8984), (4492, 4828)]