20691840

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{829}}^1$

素因数の和:864

約数の個数: 128

約数和(自身を含む): 71114400

約数和(自身を除く): 50422560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 384, 390, 416, 480, 520, 624, 640, 780, 829, 832, 960, 1040, 1248, 1560, 1658, 1664, 1920, 2080, 2487, 2496, 3120, 3316, 4145, 4160, 4974, 4992, 6240, 6632, 8290, 8320, 9948, 10777, 12435, 12480, 13264, 16580, 19896, 21554, 24870, 24960, 26528, 32331, 33160, 39792, 43108, 49740, 53056, 53885, 64662, 66320, 79584, 86216, 99480, 106112, 107770, 129324, 132640, 159168, 161655, 172432, 198960, 215540, 258648, 265280, 318336, 323310, 344864, 397920, 431080, 517296, 530560, 646620, 689728, 795840, 862160, 1034592, 1293240, 1379456, 1591680, 1724320, 2069184, 2586480, 3448640, 4138368, 5172960, 6897280, 10345920, 20691840]

約数ペア:

[(1, 20691840), (2, 10345920), (3, 6897280), (4, 5172960), (5, 4138368), (6, 3448640), (8, 2586480), (10, 2069184), (12, 1724320), (13, 1591680), (15, 1379456), (16, 1293240), (20, 1034592), (24, 862160), (26, 795840), (30, 689728), (32, 646620), (39, 530560), (40, 517296), (48, 431080), (52, 397920), (60, 344864), (64, 323310), (65, 318336), (78, 265280), (80, 258648), (96, 215540), (104, 198960), (120, 172432), (128, 161655), (130, 159168), (156, 132640), (160, 129324), (192, 107770), (195, 106112), (208, 99480), (240, 86216), (260, 79584), (312, 66320), (320, 64662), (384, 53885), (390, 53056), (416, 49740), (480, 43108), (520, 39792), (624, 33160), (640, 32331), (780, 26528), (829, 24960), (832, 24870), (960, 21554), (1040, 19896), (1248, 16580), (1560, 13264), (1658, 12480), (1664, 12435), (1920, 10777), (2080, 9948), (2487, 8320), (2496, 8290), (3120, 6632), (3316, 6240), (4145, 4992), (4160, 4974)]