20790904

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{491}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 40147200

約数和(自身を除く): 19356296

約数列:

[1, 2, 4, 8, 67, 79, 134, 158, 268, 316, 491, 536, 632, 982, 1964, 3928, 5293, 10586, 21172, 32897, 38789, 42344, 65794, 77578, 131588, 155156, 263176, 310312, 2598863, 5197726, 10395452, 20790904]

約数ペア:

[(1, 20790904), (2, 10395452), (4, 5197726), (8, 2598863), (67, 310312), (79, 263176), (134, 155156), (158, 131588), (268, 77578), (316, 65794), (491, 42344), (536, 38789), (632, 32897), (982, 21172), (1964, 10586), (3928, 5293)]