21146825

素因数分解:

$5^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{811}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 30206400

約数和(自身を除く): 9059575

約数列:

[1, 5, 7, 25, 35, 149, 175, 745, 811, 1043, 3725, 4055, 5215, 5677, 20275, 26075, 28385, 120839, 141925, 604195, 845873, 3020975, 4229365, 21146825]

約数ペア:

[(1, 21146825), (5, 4229365), (7, 3020975), (25, 845873), (35, 604195), (149, 141925), (175, 120839), (745, 28385), (811, 26075), (1043, 20275), (3725, 5677), (4055, 5215)]