20403825

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1231}}^1$

素因数の和:1274

約数の個数: 48

約数和(自身を含む): 38497536

約数和(自身を除く): 18093711

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1231, 1275, 3315, 3693, 5525, 6155, 16003, 16575, 18465, 20927, 30775, 48009, 62781, 80015, 92325, 104635, 240045, 272051, 313905, 400075, 523175, 816153, 1200225, 1360255, 1569525, 4080765, 6801275, 20403825]

約数ペア:

[(1, 20403825), (3, 6801275), (5, 4080765), (13, 1569525), (15, 1360255), (17, 1200225), (25, 816153), (39, 523175), (51, 400075), (65, 313905), (75, 272051), (85, 240045), (195, 104635), (221, 92325), (255, 80015), (325, 62781), (425, 48009), (663, 30775), (975, 20927), (1105, 18465), (1231, 16575), (1275, 16003), (3315, 6155), (3693, 5525)]