21219930

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1721}}^1$

素因数の和:1871

約数の個数: 48

約数和(自身を含む): 55606824

約数和(自身を除く): 34386894

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 137, 274, 411, 685, 822, 1233, 1370, 1721, 2055, 2466, 3442, 4110, 5163, 6165, 8605, 10326, 12330, 15489, 17210, 25815, 30978, 51630, 77445, 154890, 235777, 471554, 707331, 1178885, 1414662, 2121993, 2357770, 3536655, 4243986, 7073310, 10609965, 21219930]

約数ペア:

[(1, 21219930), (2, 10609965), (3, 7073310), (5, 4243986), (6, 3536655), (9, 2357770), (10, 2121993), (15, 1414662), (18, 1178885), (30, 707331), (45, 471554), (90, 235777), (137, 154890), (274, 77445), (411, 51630), (685, 30978), (822, 25815), (1233, 17210), (1370, 15489), (1721, 12330), (2055, 10326), (2466, 8605), (3442, 6165), (4110, 5163)]