20963425

素因数分解:

$5^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:290

約数の個数: 36

約数和(自身を含む): 30710460

約数和(自身を除く): 9747035

約数列:

[1, 5, 7, 25, 35, 49, 109, 157, 175, 245, 545, 763, 785, 1099, 1225, 2725, 3815, 3925, 5341, 5495, 7693, 17113, 19075, 26705, 27475, 38465, 85565, 119791, 133525, 192325, 427825, 598955, 838537, 2994775, 4192685, 20963425]

約数ペア:

[(1, 20963425), (5, 4192685), (7, 2994775), (25, 838537), (35, 598955), (49, 427825), (109, 192325), (157, 133525), (175, 119791), (245, 85565), (545, 38465), (763, 27475), (785, 26705), (1099, 19075), (1225, 17113), (2725, 7693), (3815, 5495), (3925, 5341)]