21550004

素因数分解:

$2^2\times 7^3\times {\mathrm{113}}^1\times {\mathrm{139}}^1$

素因数の和:277

約数の個数: 48

約数和(自身を含む): 44688000

約数和(自身を除く): 23137996

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 113, 139, 196, 226, 278, 343, 452, 556, 686, 791, 973, 1372, 1582, 1946, 3164, 3892, 5537, 6811, 11074, 13622, 15707, 22148, 27244, 31414, 38759, 47677, 62828, 77518, 95354, 109949, 155036, 190708, 219898, 439796, 769643, 1539286, 3078572, 5387501, 10775002, 21550004]

約数ペア:

[(1, 21550004), (2, 10775002), (4, 5387501), (7, 3078572), (14, 1539286), (28, 769643), (49, 439796), (98, 219898), (113, 190708), (139, 155036), (196, 109949), (226, 95354), (278, 77518), (343, 62828), (452, 47677), (556, 38759), (686, 31414), (791, 27244), (973, 22148), (1372, 15707), (1582, 13622), (1946, 11074), (3164, 6811), (3892, 5537)]