21356488

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{373}}^1\times {\mathrm{421}}^1$

素因数の和:817

約数の個数: 32

約数和(自身を含む): 42613560

約数和(自身を除く): 21257072

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 373, 421, 746, 842, 1492, 1684, 2984, 3368, 6341, 7157, 12682, 14314, 25364, 28628, 50728, 57256, 157033, 314066, 628132, 1256264, 2669561, 5339122, 10678244, 21356488]

約数ペア:

[(1, 21356488), (2, 10678244), (4, 5339122), (8, 2669561), (17, 1256264), (34, 628132), (68, 314066), (136, 157033), (373, 57256), (421, 50728), (746, 28628), (842, 25364), (1492, 14314), (1684, 12682), (2984, 7157), (3368, 6341)]