21909375

素因数分解:

$3^2\times 5^5\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:91

約数の個数: 72

約数和(自身を含む): 42653520

約数和(自身を除く): 20744145

約数列:

[1, 3, 5, 9, 15, 19, 25, 41, 45, 57, 75, 95, 123, 125, 171, 205, 225, 285, 369, 375, 475, 615, 625, 779, 855, 1025, 1125, 1425, 1845, 1875, 2337, 2375, 3075, 3125, 3895, 4275, 5125, 5625, 7011, 7125, 9225, 9375, 11685, 11875, 15375, 19475, 21375, 25625, 28125, 35055, 35625, 46125, 58425, 59375, 76875, 97375, 106875, 128125, 175275, 178125, 230625, 292125, 384375, 486875, 534375, 876375, 1153125, 1460625, 2434375, 4381875, 7303125, 21909375]

約数ペア:

[(1, 21909375), (3, 7303125), (5, 4381875), (9, 2434375), (15, 1460625), (19, 1153125), (25, 876375), (41, 534375), (45, 486875), (57, 384375), (75, 292125), (95, 230625), (123, 178125), (125, 175275), (171, 128125), (205, 106875), (225, 97375), (285, 76875), (369, 59375), (375, 58425), (475, 46125), (615, 35625), (625, 35055), (779, 28125), (855, 25625), (1025, 21375), (1125, 19475), (1425, 15375), (1845, 11875), (1875, 11685), (2337, 9375), (2375, 9225), (3075, 7125), (3125, 7011), (3895, 5625), (4275, 5125)]