20209720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12323}}^1$

素因数の和:12375

約数の個数: 32

約数和(自身を含む): 46584720

約数和(自身を除く): 26375000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12323, 24646, 49292, 61615, 98584, 123230, 246460, 492920, 505243, 1010486, 2020972, 2526215, 4041944, 5052430, 10104860, 20209720]

約数ペア:

[(1, 20209720), (2, 10104860), (4, 5052430), (5, 4041944), (8, 2526215), (10, 2020972), (20, 1010486), (40, 505243), (41, 492920), (82, 246460), (164, 123230), (205, 98584), (328, 61615), (410, 49292), (820, 24646), (1640, 12323)]