1640448520

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{10513}}^1$

素因数の和:10654

約数の個数: 64

約数和(自身を含む): 3815320320

約数和(自身を除く): 2174871800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 83, 94, 166, 188, 235, 332, 376, 415, 470, 664, 830, 940, 1660, 1880, 3320, 3901, 7802, 10513, 15604, 19505, 21026, 31208, 39010, 42052, 52565, 78020, 84104, 105130, 156040, 210260, 420520, 494111, 872579, 988222, 1745158, 1976444, 2470555, 3490316, 3952888, 4362895, 4941110, 6980632, 8725790, 9882220, 17451580, 19764440, 34903160, 41011213, 82022426, 164044852, 205056065, 328089704, 410112130, 820224260, 1640448520]

約数ペア:

[(1, 1640448520), (2, 820224260), (4, 410112130), (5, 328089704), (8, 205056065), (10, 164044852), (20, 82022426), (40, 41011213), (47, 34903160), (83, 19764440), (94, 17451580), (166, 9882220), (188, 8725790), (235, 6980632), (332, 4941110), (376, 4362895), (415, 3952888), (470, 3490316), (664, 2470555), (830, 1976444), (940, 1745158), (1660, 988222), (1880, 872579), (3320, 494111), (3901, 420520), (7802, 210260), (10513, 156040), (15604, 105130), (19505, 84104), (21026, 78020), (31208, 52565), (39010, 42052)]