21637784

素因数分解:

$2^3\times 7^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:232

約数の個数: 64

約数和(自身を含む): 48307200

約数和(自身を除く): 26669416

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 67, 73, 79, 134, 146, 158, 268, 292, 316, 469, 511, 536, 553, 584, 632, 938, 1022, 1106, 1876, 2044, 2212, 3752, 4088, 4424, 4891, 5293, 5767, 9782, 10586, 11534, 19564, 21172, 23068, 34237, 37051, 39128, 40369, 42344, 46136, 68474, 74102, 80738, 136948, 148204, 161476, 273896, 296408, 322952, 386389, 772778, 1545556, 2704723, 3091112, 5409446, 10818892, 21637784]

約数ペア:

[(1, 21637784), (2, 10818892), (4, 5409446), (7, 3091112), (8, 2704723), (14, 1545556), (28, 772778), (56, 386389), (67, 322952), (73, 296408), (79, 273896), (134, 161476), (146, 148204), (158, 136948), (268, 80738), (292, 74102), (316, 68474), (469, 46136), (511, 42344), (536, 40369), (553, 39128), (584, 37051), (632, 34237), (938, 23068), (1022, 21172), (1106, 19564), (1876, 11534), (2044, 10586), (2212, 9782), (3752, 5767), (4088, 5293), (4424, 4891)]