21685725

素因数分解:

$3^4\times 5^2\times {\mathrm{10709}}^1$

素因数の和:10731

約数の個数: 30

約数和(自身を含む): 40173210

約数和(自身を除く): 18487485

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 405, 675, 2025, 10709, 32127, 53545, 96381, 160635, 267725, 289143, 481905, 803175, 867429, 1445715, 2409525, 4337145, 7228575, 21685725]

約数ペア:

[(1, 21685725), (3, 7228575), (5, 4337145), (9, 2409525), (15, 1445715), (25, 867429), (27, 803175), (45, 481905), (75, 289143), (81, 267725), (135, 160635), (225, 96381), (405, 53545), (675, 32127), (2025, 10709)]