21404820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1993}}^1$

素因数の和:2184

約数の個数: 48

約数和(自身を含む): 60298560

約数和(自身を除く): 38893740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 179, 358, 537, 716, 895, 1074, 1790, 1993, 2148, 2685, 3580, 3986, 5370, 5979, 7972, 9965, 10740, 11958, 19930, 23916, 29895, 39860, 59790, 119580, 356747, 713494, 1070241, 1426988, 1783735, 2140482, 3567470, 4280964, 5351205, 7134940, 10702410, 21404820]

約数ペア:

[(1, 21404820), (2, 10702410), (3, 7134940), (4, 5351205), (5, 4280964), (6, 3567470), (10, 2140482), (12, 1783735), (15, 1426988), (20, 1070241), (30, 713494), (60, 356747), (179, 119580), (358, 59790), (537, 39860), (716, 29895), (895, 23916), (1074, 19930), (1790, 11958), (1993, 10740), (2148, 9965), (2685, 7972), (3580, 5979), (3986, 5370)]