20409305

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 29196288

約数和(自身を除く): 8786983

約数列:

[1, 5, 7, 35, 43, 71, 191, 215, 301, 355, 497, 955, 1337, 1505, 2485, 3053, 6685, 8213, 13561, 15265, 21371, 41065, 57491, 67805, 94927, 106855, 287455, 474635, 583123, 2915615, 4081861, 20409305]

約数ペア:

[(1, 20409305), (5, 4081861), (7, 2915615), (35, 583123), (43, 474635), (71, 287455), (191, 106855), (215, 94927), (301, 67805), (355, 57491), (497, 41065), (955, 21371), (1337, 15265), (1505, 13561), (2485, 8213), (3053, 6685)]