21990630

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{17047}}^1$

素因数の和:17100

約数の個数: 32

約数和(自身を含む): 54008064

約数和(自身を除く): 32017434

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290, 17047, 34094, 51141, 85235, 102282, 170470, 255705, 511410, 733021, 1466042, 2199063, 3665105, 4398126, 7330210, 10995315, 21990630]

約数ペア:

[(1, 21990630), (2, 10995315), (3, 7330210), (5, 4398126), (6, 3665105), (10, 2199063), (15, 1466042), (30, 733021), (43, 511410), (86, 255705), (129, 170470), (215, 102282), (258, 85235), (430, 51141), (645, 34094), (1290, 17047)]