19995248

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{443}}^1$

素因数の和:502

約数の個数: 80

約数和(自身を含む): 49330176

約数和(自身を除く): 29334928

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 434, 443, 496, 728, 806, 868, 886, 1456, 1612, 1736, 1772, 2821, 3101, 3224, 3472, 3544, 5642, 5759, 6202, 6448, 7088, 11284, 11518, 12404, 13733, 22568, 23036, 24808, 27466, 40313, 45136, 46072, 49616, 54932, 80626, 92144, 96131, 109864, 161252, 178529, 192262, 219728, 322504, 357058, 384524, 645008, 714116, 769048, 1249703, 1428232, 1538096, 2499406, 2856464, 4998812, 9997624, 19995248]

約数ペア:

[(1, 19995248), (2, 9997624), (4, 4998812), (7, 2856464), (8, 2499406), (13, 1538096), (14, 1428232), (16, 1249703), (26, 769048), (28, 714116), (31, 645008), (52, 384524), (56, 357058), (62, 322504), (91, 219728), (104, 192262), (112, 178529), (124, 161252), (182, 109864), (208, 96131), (217, 92144), (248, 80626), (364, 54932), (403, 49616), (434, 46072), (443, 45136), (496, 40313), (728, 27466), (806, 24808), (868, 23036), (886, 22568), (1456, 13733), (1612, 12404), (1736, 11518), (1772, 11284), (2821, 7088), (3101, 6448), (3224, 6202), (3472, 5759), (3544, 5642)]