20289464

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{349}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 42273000

約数和(自身を除く): 21983536

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 169, 172, 338, 344, 349, 559, 676, 698, 1118, 1352, 1396, 2236, 2792, 4472, 4537, 7267, 9074, 14534, 15007, 18148, 29068, 30014, 36296, 58136, 58981, 60028, 117962, 120056, 195091, 235924, 390182, 471848, 780364, 1560728, 2536183, 5072366, 10144732, 20289464]

約数ペア:

[(1, 20289464), (2, 10144732), (4, 5072366), (8, 2536183), (13, 1560728), (26, 780364), (43, 471848), (52, 390182), (86, 235924), (104, 195091), (169, 120056), (172, 117962), (338, 60028), (344, 58981), (349, 58136), (559, 36296), (676, 30014), (698, 29068), (1118, 18148), (1352, 15007), (1396, 14534), (2236, 9074), (2792, 7267), (4472, 4537)]