21312825

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 16184775

約数列:

[1, 3, 5, 15, 25, 29, 41, 75, 87, 123, 145, 205, 239, 435, 615, 717, 725, 1025, 1189, 1195, 2175, 3075, 3567, 3585, 5945, 5975, 6931, 9799, 17835, 17925, 20793, 29397, 29725, 34655, 48995, 89175, 103965, 146985, 173275, 244975, 284171, 519825, 734925, 852513, 1420855, 4262565, 7104275, 21312825]

約数ペア:

[(1, 21312825), (3, 7104275), (5, 4262565), (15, 1420855), (25, 852513), (29, 734925), (41, 519825), (75, 284171), (87, 244975), (123, 173275), (145, 146985), (205, 103965), (239, 89175), (435, 48995), (615, 34655), (717, 29725), (725, 29397), (1025, 20793), (1189, 17925), (1195, 17835), (2175, 9799), (3075, 6931), (3567, 5975), (3585, 5945)]