20472515

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 29331456

約数和(自身を除く): 8858941

約数列:

[1, 5, 7, 35, 43, 61, 215, 223, 301, 305, 427, 1115, 1505, 1561, 2135, 2623, 7805, 9589, 13115, 13603, 18361, 47945, 67123, 68015, 91805, 95221, 335615, 476105, 584929, 2924645, 4094503, 20472515]

約数ペア:

[(1, 20472515), (5, 4094503), (7, 2924645), (35, 584929), (43, 476105), (61, 335615), (215, 95221), (223, 91805), (301, 68015), (305, 67123), (427, 47945), (1115, 18361), (1505, 13603), (1561, 13115), (2135, 9589), (2623, 7805)]