21388250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6581}}^1$

素因数の和:6611

約数の個数: 32

約数和(自身を含む): 43125264

約数和(自身を除く): 21737014

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 6581, 13162, 32905, 65810, 85553, 164525, 171106, 329050, 427765, 822625, 855530, 1645250, 2138825, 4277650, 10694125, 21388250]

約数ペア:

[(1, 21388250), (2, 10694125), (5, 4277650), (10, 2138825), (13, 1645250), (25, 855530), (26, 822625), (50, 427765), (65, 329050), (125, 171106), (130, 164525), (250, 85553), (325, 65810), (650, 32905), (1625, 13162), (3250, 6581)]