19881368

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1283}}^1$

素因数の和:1451

約数の個数: 32

約数和(自身を含む): 40446000

約数和(自身を除く): 20564632

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 149, 298, 596, 1192, 1283, 1937, 2566, 3874, 5132, 7748, 10264, 15496, 16679, 33358, 66716, 133432, 191167, 382334, 764668, 1529336, 2485171, 4970342, 9940684, 19881368]

約数ペア:

[(1, 19881368), (2, 9940684), (4, 4970342), (8, 2485171), (13, 1529336), (26, 764668), (52, 382334), (104, 191167), (149, 133432), (298, 66716), (596, 33358), (1192, 16679), (1283, 15496), (1937, 10264), (2566, 7748), (3874, 5132)]