20915504

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{643}}^1$

素因数の和:777

約数の個数: 40

約数和(自身を含む): 43122240

約数和(自身を除く): 22206736

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 107, 152, 214, 304, 428, 643, 856, 1286, 1712, 2033, 2572, 4066, 5144, 8132, 10288, 12217, 16264, 24434, 32528, 48868, 68801, 97736, 137602, 195472, 275204, 550408, 1100816, 1307219, 2614438, 5228876, 10457752, 20915504]

約数ペア:

[(1, 20915504), (2, 10457752), (4, 5228876), (8, 2614438), (16, 1307219), (19, 1100816), (38, 550408), (76, 275204), (107, 195472), (152, 137602), (214, 97736), (304, 68801), (428, 48868), (643, 32528), (856, 24434), (1286, 16264), (1712, 12217), (2033, 10288), (2572, 8132), (4066, 5144)]