20478640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:159

約数の個数: 160

約数和(自身を含む): 61246080

約数和(自身を除く): 40767440

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 29, 35, 40, 52, 56, 58, 65, 70, 80, 91, 97, 104, 112, 116, 130, 140, 145, 182, 194, 203, 208, 232, 260, 280, 290, 364, 377, 388, 406, 455, 464, 485, 520, 560, 580, 679, 728, 754, 776, 812, 910, 970, 1015, 1040, 1160, 1261, 1358, 1456, 1508, 1552, 1624, 1820, 1885, 1940, 2030, 2320, 2522, 2639, 2716, 2813, 3016, 3248, 3395, 3640, 3770, 3880, 4060, 5044, 5278, 5432, 5626, 6032, 6305, 6790, 7280, 7540, 7760, 8120, 8827, 10088, 10556, 10864, 11252, 12610, 13195, 13580, 14065, 15080, 16240, 17654, 19691, 20176, 21112, 22504, 25220, 26390, 27160, 28130, 30160, 35308, 36569, 39382, 42224, 44135, 45008, 50440, 52780, 54320, 56260, 70616, 73138, 78764, 88270, 98455, 100880, 105560, 112520, 141232, 146276, 157528, 176540, 182845, 196910, 211120, 225040, 255983, 292552, 315056, 353080, 365690, 393820, 511966, 585104, 706160, 731380, 787640, 1023932, 1279915, 1462760, 1575280, 2047864, 2559830, 2925520, 4095728, 5119660, 10239320, 20478640]

約数ペア:

[(1, 20478640), (2, 10239320), (4, 5119660), (5, 4095728), (7, 2925520), (8, 2559830), (10, 2047864), (13, 1575280), (14, 1462760), (16, 1279915), (20, 1023932), (26, 787640), (28, 731380), (29, 706160), (35, 585104), (40, 511966), (52, 393820), (56, 365690), (58, 353080), (65, 315056), (70, 292552), (80, 255983), (91, 225040), (97, 211120), (104, 196910), (112, 182845), (116, 176540), (130, 157528), (140, 146276), (145, 141232), (182, 112520), (194, 105560), (203, 100880), (208, 98455), (232, 88270), (260, 78764), (280, 73138), (290, 70616), (364, 56260), (377, 54320), (388, 52780), (406, 50440), (455, 45008), (464, 44135), (485, 42224), (520, 39382), (560, 36569), (580, 35308), (679, 30160), (728, 28130), (754, 27160), (776, 26390), (812, 25220), (910, 22504), (970, 21112), (1015, 20176), (1040, 19691), (1160, 17654), (1261, 16240), (1358, 15080), (1456, 14065), (1508, 13580), (1552, 13195), (1624, 12610), (1820, 11252), (1885, 10864), (1940, 10556), (2030, 10088), (2320, 8827), (2522, 8120), (2639, 7760), (2716, 7540), (2813, 7280), (3016, 6790), (3248, 6305), (3395, 6032), (3640, 5626), (3770, 5432), (3880, 5278), (4060, 5044)]