20568640

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:252

約数の個数: 112

約数和(自身を含む): 54864000

約数和(自身を除く): 34295360

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 64, 68, 76, 80, 85, 95, 136, 152, 160, 170, 190, 199, 272, 304, 320, 323, 340, 380, 398, 544, 608, 646, 680, 760, 796, 995, 1088, 1216, 1292, 1360, 1520, 1592, 1615, 1990, 2584, 2720, 3040, 3184, 3230, 3383, 3781, 3980, 5168, 5440, 6080, 6368, 6460, 6766, 7562, 7960, 10336, 12736, 12920, 13532, 15124, 15920, 16915, 18905, 20672, 25840, 27064, 30248, 31840, 33830, 37810, 51680, 54128, 60496, 63680, 64277, 67660, 75620, 103360, 108256, 120992, 128554, 135320, 151240, 216512, 241984, 257108, 270640, 302480, 321385, 514216, 541280, 604960, 642770, 1028432, 1082560, 1209920, 1285540, 2056864, 2571080, 4113728, 5142160, 10284320, 20568640]

約数ペア:

[(1, 20568640), (2, 10284320), (4, 5142160), (5, 4113728), (8, 2571080), (10, 2056864), (16, 1285540), (17, 1209920), (19, 1082560), (20, 1028432), (32, 642770), (34, 604960), (38, 541280), (40, 514216), (64, 321385), (68, 302480), (76, 270640), (80, 257108), (85, 241984), (95, 216512), (136, 151240), (152, 135320), (160, 128554), (170, 120992), (190, 108256), (199, 103360), (272, 75620), (304, 67660), (320, 64277), (323, 63680), (340, 60496), (380, 54128), (398, 51680), (544, 37810), (608, 33830), (646, 31840), (680, 30248), (760, 27064), (796, 25840), (995, 20672), (1088, 18905), (1216, 16915), (1292, 15920), (1360, 15124), (1520, 13532), (1592, 12920), (1615, 12736), (1990, 10336), (2584, 7960), (2720, 7562), (3040, 6766), (3184, 6460), (3230, 6368), (3383, 6080), (3781, 5440), (3980, 5168)]