21178990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{10433}}^1$

素因数の和:10476

約数の個数: 32

約数和(自身を含む): 45074880

約数和(自身を除く): 23895890

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 406, 1015, 2030, 10433, 20866, 52165, 73031, 104330, 146062, 302557, 365155, 605114, 730310, 1512785, 2117899, 3025570, 4235798, 10589495, 21178990]

約数ペア:

[(1, 21178990), (2, 10589495), (5, 4235798), (7, 3025570), (10, 2117899), (14, 1512785), (29, 730310), (35, 605114), (58, 365155), (70, 302557), (145, 146062), (203, 104330), (290, 73031), (406, 52165), (1015, 20866), (2030, 10433)]