21528115

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{569}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 9990605

約数列:

[1, 5, 7, 23, 35, 47, 115, 161, 235, 329, 569, 805, 1081, 1645, 2845, 3983, 5405, 7567, 13087, 19915, 26743, 37835, 65435, 91609, 133715, 187201, 458045, 615089, 936005, 3075445, 4305623, 21528115]

約数ペア:

[(1, 21528115), (5, 4305623), (7, 3075445), (23, 936005), (35, 615089), (47, 458045), (115, 187201), (161, 133715), (235, 91609), (329, 65435), (569, 37835), (805, 26743), (1081, 19915), (1645, 13087), (2845, 7567), (3983, 5405)]