21465530

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1$

素因数の和:562

約数の個数: 32

約数和(自身を含む): 39855888

約数和(自身を除く): 18390358

約数列:

[1, 2, 5, 10, 53, 101, 106, 202, 265, 401, 505, 530, 802, 1010, 2005, 4010, 5353, 10706, 21253, 26765, 40501, 42506, 53530, 81002, 106265, 202505, 212530, 405010, 2146553, 4293106, 10732765, 21465530]

約数ペア:

[(1, 21465530), (2, 10732765), (5, 4293106), (10, 2146553), (53, 405010), (101, 212530), (106, 202505), (202, 106265), (265, 81002), (401, 53530), (505, 42506), (530, 40501), (802, 26765), (1010, 21253), (2005, 10706), (4010, 5353)]