21550420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{641}}^1$

素因数の和:732

約数の個数: 36

約数和(自身を含む): 46458972

約数和(自身を除く): 24908552

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 641, 820, 1282, 1681, 2564, 3205, 3362, 6410, 6724, 8405, 12820, 16810, 26281, 33620, 52562, 105124, 131405, 262810, 525620, 1077521, 2155042, 4310084, 5387605, 10775210, 21550420]

約数ペア:

[(1, 21550420), (2, 10775210), (4, 5387605), (5, 4310084), (10, 2155042), (20, 1077521), (41, 525620), (82, 262810), (164, 131405), (205, 105124), (410, 52562), (641, 33620), (820, 26281), (1282, 16810), (1681, 12820), (2564, 8405), (3205, 6724), (3362, 6410)]