21020280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{3727}}^1$

素因数の和:3788

約数の個数: 64

約数和(自身を含む): 64419840

約数和(自身を除く): 43399560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 47, 60, 94, 120, 141, 188, 235, 282, 376, 470, 564, 705, 940, 1128, 1410, 1880, 2820, 3727, 5640, 7454, 11181, 14908, 18635, 22362, 29816, 37270, 44724, 55905, 74540, 89448, 111810, 149080, 175169, 223620, 350338, 447240, 525507, 700676, 875845, 1051014, 1401352, 1751690, 2102028, 2627535, 3503380, 4204056, 5255070, 7006760, 10510140, 21020280]

約数ペア:

[(1, 21020280), (2, 10510140), (3, 7006760), (4, 5255070), (5, 4204056), (6, 3503380), (8, 2627535), (10, 2102028), (12, 1751690), (15, 1401352), (20, 1051014), (24, 875845), (30, 700676), (40, 525507), (47, 447240), (60, 350338), (94, 223620), (120, 175169), (141, 149080), (188, 111810), (235, 89448), (282, 74540), (376, 55905), (470, 44724), (564, 37270), (705, 29816), (940, 22362), (1128, 18635), (1410, 14908), (1880, 11181), (2820, 7454), (3727, 5640)]