19946704

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{809}}^1$

素因数の和:907

約数の個数: 40

約数和(自身を含む): 40979520

約数和(自身を除く): 21032816

約数列:

[1, 2, 4, 8, 16, 23, 46, 67, 92, 134, 184, 268, 368, 536, 809, 1072, 1541, 1618, 3082, 3236, 6164, 6472, 12328, 12944, 18607, 24656, 37214, 54203, 74428, 108406, 148856, 216812, 297712, 433624, 867248, 1246669, 2493338, 4986676, 9973352, 19946704]

約数ペア:

[(1, 19946704), (2, 9973352), (4, 4986676), (8, 2493338), (16, 1246669), (23, 867248), (46, 433624), (67, 297712), (92, 216812), (134, 148856), (184, 108406), (268, 74428), (368, 54203), (536, 37214), (809, 24656), (1072, 18607), (1541, 12944), (1618, 12328), (3082, 6472), (3236, 6164)]