81089540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{653}}^1\times {\mathrm{887}}^1$

素因数の和:1556

約数の個数: 48

約数和(自身を含む): 195132672

約数和(自身を除く): 114043132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 653, 887, 1306, 1774, 2612, 3265, 3548, 4435, 4571, 6209, 6530, 8870, 9142, 12418, 13060, 17740, 18284, 22855, 24836, 31045, 45710, 62090, 91420, 124180, 579211, 1158422, 2316844, 2896055, 4054477, 5792110, 8108954, 11584220, 16217908, 20272385, 40544770, 81089540]

約数ペア:

[(1, 81089540), (2, 40544770), (4, 20272385), (5, 16217908), (7, 11584220), (10, 8108954), (14, 5792110), (20, 4054477), (28, 2896055), (35, 2316844), (70, 1158422), (140, 579211), (653, 124180), (887, 91420), (1306, 62090), (1774, 45710), (2612, 31045), (3265, 24836), (3548, 22855), (4435, 18284), (4571, 17740), (6209, 13060), (6530, 12418), (8870, 9142)]