21854775

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 39024288

約数和(自身を除く): 17169513

約数列:

[1, 3, 5, 15, 17, 25, 51, 61, 75, 85, 183, 255, 281, 305, 425, 843, 915, 1037, 1275, 1405, 1525, 3111, 4215, 4575, 4777, 5185, 7025, 14331, 15555, 17141, 21075, 23885, 25925, 51423, 71655, 77775, 85705, 119425, 257115, 291397, 358275, 428525, 874191, 1285575, 1456985, 4370955, 7284925, 21854775]

約数ペア:

[(1, 21854775), (3, 7284925), (5, 4370955), (15, 1456985), (17, 1285575), (25, 874191), (51, 428525), (61, 358275), (75, 291397), (85, 257115), (183, 119425), (255, 85705), (281, 77775), (305, 71655), (425, 51423), (843, 25925), (915, 23885), (1037, 21075), (1275, 17141), (1405, 15555), (1525, 14331), (3111, 7025), (4215, 5185), (4575, 4777)]