21347440

素因数分解:

$2^4\times 5^1\times {\mathrm{347}}^1\times {\mathrm{769}}^1$

素因数の和:1129

約数の個数: 40

約数和(自身を含む): 49840560

約数和(自身を除く): 28493120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 347, 694, 769, 1388, 1538, 1735, 2776, 3076, 3470, 3845, 5552, 6152, 6940, 7690, 12304, 13880, 15380, 27760, 30760, 61520, 266843, 533686, 1067372, 1334215, 2134744, 2668430, 4269488, 5336860, 10673720, 21347440]

約数ペア:

[(1, 21347440), (2, 10673720), (4, 5336860), (5, 4269488), (8, 2668430), (10, 2134744), (16, 1334215), (20, 1067372), (40, 533686), (80, 266843), (347, 61520), (694, 30760), (769, 27760), (1388, 15380), (1538, 13880), (1735, 12304), (2776, 7690), (3076, 6940), (3470, 6152), (3845, 5552)]