21098280

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25117}}^1$

素因数の和:25138

約数の個数: 64

約数和(自身を含む): 72339840

約数和(自身を除く): 51241560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25117, 50234, 75351, 100468, 125585, 150702, 175819, 200936, 251170, 301404, 351638, 376755, 502340, 527457, 602808, 703276, 753510, 879095, 1004680, 1054914, 1406552, 1507020, 1758190, 2109828, 2637285, 3014040, 3516380, 4219656, 5274570, 7032760, 10549140, 21098280]

約数ペア:

[(1, 21098280), (2, 10549140), (3, 7032760), (4, 5274570), (5, 4219656), (6, 3516380), (7, 3014040), (8, 2637285), (10, 2109828), (12, 1758190), (14, 1507020), (15, 1406552), (20, 1054914), (21, 1004680), (24, 879095), (28, 753510), (30, 703276), (35, 602808), (40, 527457), (42, 502340), (56, 376755), (60, 351638), (70, 301404), (84, 251170), (105, 200936), (120, 175819), (140, 150702), (168, 125585), (210, 100468), (280, 75351), (420, 50234), (840, 25117)]