31019720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{12713}}^1$

素因数の和:12785

約数の個数: 32

約数和(自身を含む): 70944120

約数和(自身を除く): 39924400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 12713, 25426, 50852, 63565, 101704, 127130, 254260, 508520, 775493, 1550986, 3101972, 3877465, 6203944, 7754930, 15509860, 31019720]

約数ペア:

[(1, 31019720), (2, 15509860), (4, 7754930), (5, 6203944), (8, 3877465), (10, 3101972), (20, 1550986), (40, 775493), (61, 508520), (122, 254260), (244, 127130), (305, 101704), (488, 63565), (610, 50852), (1220, 25426), (2440, 12713)]