21756375

素因数分解:

$3^2\times 5^3\times {\mathrm{83}}^1\times {\mathrm{233}}^1$

素因数の和:337

約数の個数: 48

約数和(自身を含む): 39862368

約数和(自身を除く): 18105993

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 83, 125, 225, 233, 249, 375, 415, 699, 747, 1125, 1165, 1245, 2075, 2097, 3495, 3735, 5825, 6225, 10375, 10485, 17475, 18675, 19339, 29125, 31125, 52425, 58017, 87375, 93375, 96695, 174051, 262125, 290085, 483475, 870255, 1450425, 2417375, 4351275, 7252125, 21756375]

約数ペア:

[(1, 21756375), (3, 7252125), (5, 4351275), (9, 2417375), (15, 1450425), (25, 870255), (45, 483475), (75, 290085), (83, 262125), (125, 174051), (225, 96695), (233, 93375), (249, 87375), (375, 58017), (415, 52425), (699, 31125), (747, 29125), (1125, 19339), (1165, 18675), (1245, 17475), (2075, 10485), (2097, 10375), (3495, 6225), (3735, 5825)]