71828820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{523}}^1$

素因数の和:654

約数の個数: 144

約数和(自身を含む): 251771520

約数和(自身を除く): 179942700

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 109, 126, 140, 180, 210, 218, 252, 315, 327, 420, 436, 523, 545, 630, 654, 763, 981, 1046, 1090, 1260, 1308, 1526, 1569, 1635, 1962, 2092, 2180, 2289, 2615, 3052, 3138, 3270, 3661, 3815, 3924, 4578, 4707, 4905, 5230, 6276, 6540, 6867, 7322, 7630, 7845, 9156, 9414, 9810, 10460, 10983, 11445, 13734, 14644, 15260, 15690, 18305, 18828, 19620, 21966, 22890, 23535, 27468, 31380, 32949, 34335, 36610, 43932, 45780, 47070, 54915, 57007, 65898, 68670, 73220, 94140, 109830, 114014, 131796, 137340, 164745, 171021, 219660, 228028, 285035, 329490, 342042, 399049, 513063, 570070, 658980, 684084, 798098, 855105, 1026126, 1140140, 1197147, 1596196, 1710210, 1995245, 2052252, 2394294, 2565315, 3420420, 3591441, 3990490, 4788588, 5130630, 5985735, 7182882, 7980980, 10261260, 11971470, 14365764, 17957205, 23942940, 35914410, 71828820]

約数ペア:

[(1, 71828820), (2, 35914410), (3, 23942940), (4, 17957205), (5, 14365764), (6, 11971470), (7, 10261260), (9, 7980980), (10, 7182882), (12, 5985735), (14, 5130630), (15, 4788588), (18, 3990490), (20, 3591441), (21, 3420420), (28, 2565315), (30, 2394294), (35, 2052252), (36, 1995245), (42, 1710210), (45, 1596196), (60, 1197147), (63, 1140140), (70, 1026126), (84, 855105), (90, 798098), (105, 684084), (109, 658980), (126, 570070), (140, 513063), (180, 399049), (210, 342042), (218, 329490), (252, 285035), (315, 228028), (327, 219660), (420, 171021), (436, 164745), (523, 137340), (545, 131796), (630, 114014), (654, 109830), (763, 94140), (981, 73220), (1046, 68670), (1090, 65898), (1260, 57007), (1308, 54915), (1526, 47070), (1569, 45780), (1635, 43932), (1962, 36610), (2092, 34335), (2180, 32949), (2289, 31380), (2615, 27468), (3052, 23535), (3138, 22890), (3270, 21966), (3661, 19620), (3815, 18828), (3924, 18305), (4578, 15690), (4707, 15260), (4905, 14644), (5230, 13734), (6276, 11445), (6540, 10983), (6867, 10460), (7322, 9810), (7630, 9414), (7845, 9156)]