21390736

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1571}}^1$

素因数の和:1639

約数の個数: 40

約数和(自身を含む): 44443584

約数和(自身を除く): 23052848

約数列:

[1, 2, 4, 8, 16, 23, 37, 46, 74, 92, 148, 184, 296, 368, 592, 851, 1571, 1702, 3142, 3404, 6284, 6808, 12568, 13616, 25136, 36133, 58127, 72266, 116254, 144532, 232508, 289064, 465016, 578128, 930032, 1336921, 2673842, 5347684, 10695368, 21390736]

約数ペア:

[(1, 21390736), (2, 10695368), (4, 5347684), (8, 2673842), (16, 1336921), (23, 930032), (37, 578128), (46, 465016), (74, 289064), (92, 232508), (148, 144532), (184, 116254), (296, 72266), (368, 58127), (592, 36133), (851, 25136), (1571, 13616), (1702, 12568), (3142, 6808), (3404, 6284)]