21680575

素因数分解:

$5^2\times 7^1\times {\mathrm{229}}^1\times {\mathrm{541}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 30915680

約数和(自身を除く): 9235105

約数列:

[1, 5, 7, 25, 35, 175, 229, 541, 1145, 1603, 2705, 3787, 5725, 8015, 13525, 18935, 40075, 94675, 123889, 619445, 867223, 3097225, 4336115, 21680575]

約数ペア:

[(1, 21680575), (5, 4336115), (7, 3097225), (25, 867223), (35, 619445), (175, 123889), (229, 94675), (541, 40075), (1145, 18935), (1603, 13525), (2705, 8015), (3787, 5725)]