128903908

素因数分解:

$2^2\times 7^2\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 272341440

約数和(自身を除く): 143437532

約数列:

[1, 2, 4, 7, 14, 28, 49, 59, 71, 98, 118, 142, 157, 196, 236, 284, 314, 413, 497, 628, 826, 994, 1099, 1652, 1988, 2198, 2891, 3479, 4189, 4396, 5782, 6958, 7693, 8378, 9263, 11147, 11564, 13916, 15386, 16756, 18526, 22294, 29323, 30772, 37052, 44588, 58646, 64841, 78029, 117292, 129682, 156058, 205261, 259364, 312116, 410522, 453887, 546203, 657673, 821044, 907774, 1092406, 1315346, 1815548, 2184812, 2630692, 4603711, 9207422, 18414844, 32225977, 64451954, 128903908]

約数ペア:

[(1, 128903908), (2, 64451954), (4, 32225977), (7, 18414844), (14, 9207422), (28, 4603711), (49, 2630692), (59, 2184812), (71, 1815548), (98, 1315346), (118, 1092406), (142, 907774), (157, 821044), (196, 657673), (236, 546203), (284, 453887), (314, 410522), (413, 312116), (497, 259364), (628, 205261), (826, 156058), (994, 129682), (1099, 117292), (1652, 78029), (1988, 64841), (2198, 58646), (2891, 44588), (3479, 37052), (4189, 30772), (4396, 29323), (5782, 22294), (6958, 18526), (7693, 16756), (8378, 15386), (9263, 13916), (11147, 11564)]