21278176

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{443}}^1$

素因数の和:551

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 23477024

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 79, 152, 158, 304, 316, 443, 608, 632, 886, 1264, 1501, 1772, 2528, 3002, 3544, 6004, 7088, 8417, 12008, 14176, 16834, 24016, 33668, 34997, 48032, 67336, 69994, 134672, 139988, 269344, 279976, 559952, 664943, 1119904, 1329886, 2659772, 5319544, 10639088, 21278176]

約数ペア:

[(1, 21278176), (2, 10639088), (4, 5319544), (8, 2659772), (16, 1329886), (19, 1119904), (32, 664943), (38, 559952), (76, 279976), (79, 269344), (152, 139988), (158, 134672), (304, 69994), (316, 67336), (443, 48032), (608, 34997), (632, 33668), (886, 24016), (1264, 16834), (1501, 14176), (1772, 12008), (2528, 8417), (3002, 7088), (3544, 6004)]