21362740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{461}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 51537024

約数和(自身を除く): 30174284

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 461, 662, 922, 1324, 1655, 1844, 2305, 2317, 3227, 3310, 4610, 4634, 6454, 6620, 9220, 9268, 11585, 12908, 16135, 23170, 32270, 46340, 64540, 152591, 305182, 610364, 762955, 1068137, 1525910, 2136274, 3051820, 4272548, 5340685, 10681370, 21362740]

約数ペア:

[(1, 21362740), (2, 10681370), (4, 5340685), (5, 4272548), (7, 3051820), (10, 2136274), (14, 1525910), (20, 1068137), (28, 762955), (35, 610364), (70, 305182), (140, 152591), (331, 64540), (461, 46340), (662, 32270), (922, 23170), (1324, 16135), (1655, 12908), (1844, 11585), (2305, 9268), (2317, 9220), (3227, 6620), (3310, 6454), (4610, 4634)]