19504784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1187}}^1$

素因数の和:1287

約数の個数: 40

約数和(自身を含む): 41247360

約数和(自身を除く): 21742576

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 104, 158, 208, 316, 632, 1027, 1187, 1264, 2054, 2374, 4108, 4748, 8216, 9496, 15431, 16432, 18992, 30862, 61724, 93773, 123448, 187546, 246896, 375092, 750184, 1219049, 1500368, 2438098, 4876196, 9752392, 19504784]

約数ペア:

[(1, 19504784), (2, 9752392), (4, 4876196), (8, 2438098), (13, 1500368), (16, 1219049), (26, 750184), (52, 375092), (79, 246896), (104, 187546), (158, 123448), (208, 93773), (316, 61724), (632, 30862), (1027, 18992), (1187, 16432), (1264, 15431), (2054, 9496), (2374, 8216), (4108, 4748)]