128191720

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1\times {\mathrm{359}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 295488000

約数和(自身を除く): 167296280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 113, 158, 226, 316, 359, 395, 452, 565, 632, 718, 790, 904, 1130, 1436, 1580, 1795, 2260, 2872, 3160, 3590, 4520, 7180, 8927, 14360, 17854, 28361, 35708, 40567, 44635, 56722, 71416, 81134, 89270, 113444, 141805, 162268, 178540, 202835, 226888, 283610, 324536, 357080, 405670, 567220, 811340, 1134440, 1622680, 3204793, 6409586, 12819172, 16023965, 25638344, 32047930, 64095860, 128191720]

約数ペア:

[(1, 128191720), (2, 64095860), (4, 32047930), (5, 25638344), (8, 16023965), (10, 12819172), (20, 6409586), (40, 3204793), (79, 1622680), (113, 1134440), (158, 811340), (226, 567220), (316, 405670), (359, 357080), (395, 324536), (452, 283610), (565, 226888), (632, 202835), (718, 178540), (790, 162268), (904, 141805), (1130, 113444), (1436, 89270), (1580, 81134), (1795, 71416), (2260, 56722), (2872, 44635), (3160, 40567), (3590, 35708), (4520, 28361), (7180, 17854), (8927, 14360)]