128428720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2903}}^1$

素因数の和:3002

約数の個数: 80

約数和(自身を含む): 345692160

約数和(自身を除く): 217263440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 79, 80, 112, 140, 158, 280, 316, 395, 553, 560, 632, 790, 1106, 1264, 1580, 2212, 2765, 2903, 3160, 4424, 5530, 5806, 6320, 8848, 11060, 11612, 14515, 20321, 22120, 23224, 29030, 40642, 44240, 46448, 58060, 81284, 101605, 116120, 162568, 203210, 229337, 232240, 325136, 406420, 458674, 812840, 917348, 1146685, 1605359, 1625680, 1834696, 2293370, 3210718, 3669392, 4586740, 6421436, 8026795, 9173480, 12842872, 16053590, 18346960, 25685744, 32107180, 64214360, 128428720]

約数ペア:

[(1, 128428720), (2, 64214360), (4, 32107180), (5, 25685744), (7, 18346960), (8, 16053590), (10, 12842872), (14, 9173480), (16, 8026795), (20, 6421436), (28, 4586740), (35, 3669392), (40, 3210718), (56, 2293370), (70, 1834696), (79, 1625680), (80, 1605359), (112, 1146685), (140, 917348), (158, 812840), (280, 458674), (316, 406420), (395, 325136), (553, 232240), (560, 229337), (632, 203210), (790, 162568), (1106, 116120), (1264, 101605), (1580, 81284), (2212, 58060), (2765, 46448), (2903, 44240), (3160, 40642), (4424, 29030), (5530, 23224), (5806, 22120), (6320, 20321), (8848, 14515), (11060, 11612)]