21901005

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{277}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 43714944

約数和(自身を除く): 21813939

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 251, 277, 315, 753, 831, 1255, 1385, 1757, 1939, 2259, 2493, 3765, 4155, 5271, 5817, 8785, 9695, 11295, 12465, 15813, 17451, 26355, 29085, 69527, 79065, 87255, 208581, 347635, 486689, 625743, 1042905, 1460067, 2433445, 3128715, 4380201, 7300335, 21901005]

約数ペア:

[(1, 21901005), (3, 7300335), (5, 4380201), (7, 3128715), (9, 2433445), (15, 1460067), (21, 1042905), (35, 625743), (45, 486689), (63, 347635), (105, 208581), (251, 87255), (277, 79065), (315, 69527), (753, 29085), (831, 26355), (1255, 17451), (1385, 15813), (1757, 12465), (1939, 11295), (2259, 9695), (2493, 8785), (3765, 5817), (4155, 5271)]