21673215

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{691}}^1$

素因数の和:760

約数の個数: 48

約数和(自身を含む): 40805856

約数和(自身を除く): 19132641

約数列:

[1, 3, 5, 9, 15, 17, 41, 45, 51, 85, 123, 153, 205, 255, 369, 615, 691, 697, 765, 1845, 2073, 2091, 3455, 3485, 6219, 6273, 10365, 10455, 11747, 28331, 31095, 31365, 35241, 58735, 84993, 105723, 141655, 176205, 254979, 424965, 481627, 528615, 1274895, 1444881, 2408135, 4334643, 7224405, 21673215]

約数ペア:

[(1, 21673215), (3, 7224405), (5, 4334643), (9, 2408135), (15, 1444881), (17, 1274895), (41, 528615), (45, 481627), (51, 424965), (85, 254979), (123, 176205), (153, 141655), (205, 105723), (255, 84993), (369, 58735), (615, 35241), (691, 31365), (697, 31095), (765, 28331), (1845, 11747), (2073, 10455), (2091, 10365), (3455, 6273), (3485, 6219)]