20956125

素因数分解:

$3^1\times 5^3\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 16783395

約数列:

[1, 3, 5, 15, 25, 29, 41, 47, 75, 87, 123, 125, 141, 145, 205, 235, 375, 435, 615, 705, 725, 1025, 1175, 1189, 1363, 1927, 2175, 3075, 3525, 3567, 3625, 4089, 5125, 5781, 5875, 5945, 6815, 9635, 10875, 15375, 17625, 17835, 20445, 28905, 29725, 34075, 48175, 55883, 89175, 102225, 144525, 148625, 167649, 170375, 240875, 279415, 445875, 511125, 722625, 838245, 1397075, 4191225, 6985375, 20956125]

約数ペア:

[(1, 20956125), (3, 6985375), (5, 4191225), (15, 1397075), (25, 838245), (29, 722625), (41, 511125), (47, 445875), (75, 279415), (87, 240875), (123, 170375), (125, 167649), (141, 148625), (145, 144525), (205, 102225), (235, 89175), (375, 55883), (435, 48175), (615, 34075), (705, 29725), (725, 28905), (1025, 20445), (1175, 17835), (1189, 17625), (1363, 15375), (1927, 10875), (2175, 9635), (3075, 6815), (3525, 5945), (3567, 5875), (3625, 5781), (4089, 5125)]