20870720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{173}}^1$

素因数の和:232

約数の個数: 112

約数和(自身を含む): 55686960

約数和(自身を除く): 34816240

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 64, 65, 80, 104, 116, 130, 145, 160, 173, 208, 232, 260, 290, 320, 346, 377, 416, 464, 520, 580, 692, 754, 832, 865, 928, 1040, 1160, 1384, 1508, 1730, 1856, 1885, 2080, 2249, 2320, 2768, 3016, 3460, 3770, 4160, 4498, 4640, 5017, 5536, 6032, 6920, 7540, 8996, 9280, 10034, 11072, 11245, 12064, 13840, 15080, 17992, 20068, 22490, 24128, 25085, 27680, 30160, 35984, 40136, 44980, 50170, 55360, 60320, 65221, 71968, 80272, 89960, 100340, 120640, 130442, 143936, 160544, 179920, 200680, 260884, 321088, 326105, 359840, 401360, 521768, 652210, 719680, 802720, 1043536, 1304420, 1605440, 2087072, 2608840, 4174144, 5217680, 10435360, 20870720]

約数ペア:

[(1, 20870720), (2, 10435360), (4, 5217680), (5, 4174144), (8, 2608840), (10, 2087072), (13, 1605440), (16, 1304420), (20, 1043536), (26, 802720), (29, 719680), (32, 652210), (40, 521768), (52, 401360), (58, 359840), (64, 326105), (65, 321088), (80, 260884), (104, 200680), (116, 179920), (130, 160544), (145, 143936), (160, 130442), (173, 120640), (208, 100340), (232, 89960), (260, 80272), (290, 71968), (320, 65221), (346, 60320), (377, 55360), (416, 50170), (464, 44980), (520, 40136), (580, 35984), (692, 30160), (754, 27680), (832, 25085), (865, 24128), (928, 22490), (1040, 20068), (1160, 17992), (1384, 15080), (1508, 13840), (1730, 12064), (1856, 11245), (1885, 11072), (2080, 10034), (2249, 9280), (2320, 8996), (2768, 7540), (3016, 6920), (3460, 6032), (3770, 5536), (4160, 5017), (4498, 4640)]