20585968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5209}}^1$

素因数の和:5249

約数の個数: 40

約数和(自身を含む): 45222800

約数和(自身を除く): 24636832

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5209, 10418, 20836, 41672, 67717, 83344, 98971, 135434, 197942, 270868, 395884, 541736, 791768, 1083472, 1286623, 1583536, 2573246, 5146492, 10292984, 20585968]

約数ペア:

[(1, 20585968), (2, 10292984), (4, 5146492), (8, 2573246), (13, 1583536), (16, 1286623), (19, 1083472), (26, 791768), (38, 541736), (52, 395884), (76, 270868), (104, 197942), (152, 135434), (208, 98971), (247, 83344), (304, 67717), (494, 41672), (988, 20836), (1976, 10418), (3952, 5209)]