21007525

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1559}}^1$

素因数の和:1594

約数の個数: 36

約数和(自身を含む): 33078240

約数和(自身を除く): 12070715

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 175, 245, 275, 385, 539, 1225, 1559, 1925, 2695, 7795, 10913, 13475, 17149, 38975, 54565, 76391, 85745, 120043, 272825, 381955, 428725, 600215, 840301, 1909775, 3001075, 4201505, 21007525]

約数ペア:

[(1, 21007525), (5, 4201505), (7, 3001075), (11, 1909775), (25, 840301), (35, 600215), (49, 428725), (55, 381955), (77, 272825), (175, 120043), (245, 85745), (275, 76391), (385, 54565), (539, 38975), (1225, 17149), (1559, 13475), (1925, 10913), (2695, 7795)]