21799448

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 47139840

約数和(自身を除く): 25340392

約数列:

[1, 2, 4, 8, 11, 22, 31, 44, 61, 62, 88, 122, 124, 131, 244, 248, 262, 341, 488, 524, 671, 682, 1048, 1342, 1364, 1441, 1891, 2684, 2728, 2882, 3782, 4061, 5368, 5764, 7564, 7991, 8122, 11528, 15128, 15982, 16244, 20801, 31964, 32488, 41602, 44671, 63928, 83204, 87901, 89342, 166408, 175802, 178684, 247721, 351604, 357368, 495442, 703208, 990884, 1981768, 2724931, 5449862, 10899724, 21799448]

約数ペア:

[(1, 21799448), (2, 10899724), (4, 5449862), (8, 2724931), (11, 1981768), (22, 990884), (31, 703208), (44, 495442), (61, 357368), (62, 351604), (88, 247721), (122, 178684), (124, 175802), (131, 166408), (244, 89342), (248, 87901), (262, 83204), (341, 63928), (488, 44671), (524, 41602), (671, 32488), (682, 31964), (1048, 20801), (1342, 16244), (1364, 15982), (1441, 15128), (1891, 11528), (2684, 8122), (2728, 7991), (2882, 7564), (3782, 5764), (4061, 5368)]