21953540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{821}}^1$

素因数の和:1028

約数の個数: 48

約数和(自身を含む): 53028864

約数和(自身を除く): 31075324

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 191, 382, 764, 821, 955, 1337, 1642, 1910, 2674, 3284, 3820, 4105, 5348, 5747, 6685, 8210, 11494, 13370, 16420, 22988, 26740, 28735, 57470, 114940, 156811, 313622, 627244, 784055, 1097677, 1568110, 2195354, 3136220, 4390708, 5488385, 10976770, 21953540]

約数ペア:

[(1, 21953540), (2, 10976770), (4, 5488385), (5, 4390708), (7, 3136220), (10, 2195354), (14, 1568110), (20, 1097677), (28, 784055), (35, 627244), (70, 313622), (140, 156811), (191, 114940), (382, 57470), (764, 28735), (821, 26740), (955, 22988), (1337, 16420), (1642, 13370), (1910, 11494), (2674, 8210), (3284, 6685), (3820, 5747), (4105, 5348)]