20580975

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 39809952

約数和(自身を除く): 19228977

約数列:

[1, 3, 5, 9, 15, 23, 25, 41, 45, 69, 75, 97, 115, 123, 205, 207, 225, 291, 345, 369, 485, 575, 615, 873, 943, 1025, 1035, 1455, 1725, 1845, 2231, 2425, 2829, 3075, 3977, 4365, 4715, 5175, 6693, 7275, 8487, 9225, 11155, 11931, 14145, 19885, 20079, 21825, 23575, 33465, 35793, 42435, 55775, 59655, 70725, 91471, 99425, 100395, 167325, 178965, 212175, 274413, 298275, 457355, 501975, 823239, 894825, 1372065, 2286775, 4116195, 6860325, 20580975]

約数ペア:

[(1, 20580975), (3, 6860325), (5, 4116195), (9, 2286775), (15, 1372065), (23, 894825), (25, 823239), (41, 501975), (45, 457355), (69, 298275), (75, 274413), (97, 212175), (115, 178965), (123, 167325), (205, 100395), (207, 99425), (225, 91471), (291, 70725), (345, 59655), (369, 55775), (485, 42435), (575, 35793), (615, 33465), (873, 23575), (943, 21825), (1025, 20079), (1035, 19885), (1455, 14145), (1725, 11931), (1845, 11155), (2231, 9225), (2425, 8487), (2829, 7275), (3075, 6693), (3977, 5175), (4365, 4715)]