21354255

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{211}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 40281696

約数和(自身を除く): 18927441

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 173, 195, 211, 519, 585, 633, 865, 1055, 1557, 1899, 2249, 2595, 2743, 3165, 6747, 7785, 8229, 9495, 11245, 13715, 20241, 24687, 33735, 36503, 41145, 101205, 109509, 123435, 182515, 328527, 474539, 547545, 1423617, 1642635, 2372695, 4270851, 7118085, 21354255]

約数ペア:

[(1, 21354255), (3, 7118085), (5, 4270851), (9, 2372695), (13, 1642635), (15, 1423617), (39, 547545), (45, 474539), (65, 328527), (117, 182515), (173, 123435), (195, 109509), (211, 101205), (519, 41145), (585, 36503), (633, 33735), (865, 24687), (1055, 20241), (1557, 13715), (1899, 11245), (2249, 9495), (2595, 8229), (2743, 7785), (3165, 6747)]