21509216

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2081}}^1$

素因数の和:2127

約数の個数: 48

約数和(自身を含む): 47219760

約数和(自身を除く): 25710544

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1292, 2081, 2584, 4162, 5168, 8324, 10336, 16648, 33296, 35377, 39539, 66592, 70754, 79078, 141508, 158156, 283016, 316312, 566032, 632624, 672163, 1132064, 1265248, 1344326, 2688652, 5377304, 10754608, 21509216]

約数ペア:

[(1, 21509216), (2, 10754608), (4, 5377304), (8, 2688652), (16, 1344326), (17, 1265248), (19, 1132064), (32, 672163), (34, 632624), (38, 566032), (68, 316312), (76, 283016), (136, 158156), (152, 141508), (272, 79078), (304, 70754), (323, 66592), (544, 39539), (608, 35377), (646, 33296), (1292, 16648), (2081, 10336), (2584, 8324), (4162, 5168)]