21286845

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 39042432

約数和(自身を除く): 17755587

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 131, 157, 207, 345, 393, 471, 655, 785, 1035, 1179, 1413, 1965, 2355, 3013, 3611, 5895, 7065, 9039, 10833, 15065, 18055, 20567, 27117, 32499, 45195, 54165, 61701, 102835, 135585, 162495, 185103, 308505, 473041, 925515, 1419123, 2365205, 4257369, 7095615, 21286845]

約数ペア:

[(1, 21286845), (3, 7095615), (5, 4257369), (9, 2365205), (15, 1419123), (23, 925515), (45, 473041), (69, 308505), (115, 185103), (131, 162495), (157, 135585), (207, 102835), (345, 61701), (393, 54165), (471, 45195), (655, 32499), (785, 27117), (1035, 20567), (1179, 18055), (1413, 15065), (1965, 10833), (2355, 9039), (3013, 7065), (3611, 5895)]