12820647680

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{323101}}^1$

素因数の和:323153

約数の個数: 72

約数和(自身を含む): 31700183424

約数和(自身を除く): 18879535744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 19840, 39680, 323101, 646202, 1292404, 1615505, 2584808, 3231010, 5169616, 6462020, 10016131, 10339232, 12924040, 20032262, 20678464, 25848080, 40064524, 41356928, 50080655, 51696160, 80129048, 82713856, 100161310, 103392320, 160258096, 200322620, 206784640, 320516192, 400645240, 413569280, 641032384, 801290480, 1282064768, 1602580960, 2564129536, 3205161920, 6410323840, 12820647680]

約数ペア:

[(1, 12820647680), (2, 6410323840), (4, 3205161920), (5, 2564129536), (8, 1602580960), (10, 1282064768), (16, 801290480), (20, 641032384), (31, 413569280), (32, 400645240), (40, 320516192), (62, 206784640), (64, 200322620), (80, 160258096), (124, 103392320), (128, 100161310), (155, 82713856), (160, 80129048), (248, 51696160), (256, 50080655), (310, 41356928), (320, 40064524), (496, 25848080), (620, 20678464), (640, 20032262), (992, 12924040), (1240, 10339232), (1280, 10016131), (1984, 6462020), (2480, 5169616), (3968, 3231010), (4960, 2584808), (7936, 1615505), (9920, 1292404), (19840, 646202), (39680, 323101)]