21345520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{811}}^1$

素因数の和:878

約数の個数: 80

約数和(自身を含む): 57996288

約数和(自身を除く): 36650768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 56, 70, 80, 94, 112, 140, 188, 235, 280, 329, 376, 470, 560, 658, 752, 811, 940, 1316, 1622, 1645, 1880, 2632, 3244, 3290, 3760, 4055, 5264, 5677, 6488, 6580, 8110, 11354, 12976, 13160, 16220, 22708, 26320, 28385, 32440, 38117, 45416, 56770, 64880, 76234, 90832, 113540, 152468, 190585, 227080, 266819, 304936, 381170, 454160, 533638, 609872, 762340, 1067276, 1334095, 1524680, 2134552, 2668190, 3049360, 4269104, 5336380, 10672760, 21345520]

約数ペア:

[(1, 21345520), (2, 10672760), (4, 5336380), (5, 4269104), (7, 3049360), (8, 2668190), (10, 2134552), (14, 1524680), (16, 1334095), (20, 1067276), (28, 762340), (35, 609872), (40, 533638), (47, 454160), (56, 381170), (70, 304936), (80, 266819), (94, 227080), (112, 190585), (140, 152468), (188, 113540), (235, 90832), (280, 76234), (329, 64880), (376, 56770), (470, 45416), (560, 38117), (658, 32440), (752, 28385), (811, 26320), (940, 22708), (1316, 16220), (1622, 13160), (1645, 12976), (1880, 11354), (2632, 8110), (3244, 6580), (3290, 6488), (3760, 5677), (4055, 5264)]