639747375

素因数分解:

$3^1\times 5^3\times {\mathrm{443}}^1\times {\mathrm{3851}}^1$

素因数の和:4312

約数の個数: 32

約数和(自身を含む): 1067219712

約数和(自身を除く): 427472337

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 443, 1329, 2215, 3851, 6645, 11075, 11553, 19255, 33225, 55375, 57765, 96275, 166125, 288825, 481375, 1444125, 1705993, 5117979, 8529965, 25589895, 42649825, 127949475, 213249125, 639747375]

約数ペア:

[(1, 639747375), (3, 213249125), (5, 127949475), (15, 42649825), (25, 25589895), (75, 8529965), (125, 5117979), (375, 1705993), (443, 1444125), (1329, 481375), (2215, 288825), (3851, 166125), (6645, 96275), (11075, 57765), (11553, 55375), (19255, 33225)]