21190544

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:767

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 22199536

約数列:

[1, 2, 4, 8, 16, 23, 46, 89, 92, 178, 184, 356, 368, 647, 712, 1294, 1424, 2047, 2588, 4094, 5176, 8188, 10352, 14881, 16376, 29762, 32752, 57583, 59524, 115166, 119048, 230332, 238096, 460664, 921328, 1324409, 2648818, 5297636, 10595272, 21190544]

約数ペア:

[(1, 21190544), (2, 10595272), (4, 5297636), (8, 2648818), (16, 1324409), (23, 921328), (46, 460664), (89, 238096), (92, 230332), (178, 119048), (184, 115166), (356, 59524), (368, 57583), (647, 32752), (712, 29762), (1294, 16376), (1424, 14881), (2047, 10352), (2588, 8188), (4094, 5176)]