21135780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4049}}^1$

素因数の和:4093

約数の個数: 72

約数和(自身を含む): 66339000

約数和(自身を除く): 45203220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4049, 5220, 8098, 12147, 16196, 20245, 24294, 36441, 40490, 48588, 60735, 72882, 80980, 117421, 121470, 145764, 182205, 234842, 242940, 352263, 364410, 469684, 587105, 704526, 728820, 1056789, 1174210, 1409052, 1761315, 2113578, 2348420, 3522630, 4227156, 5283945, 7045260, 10567890, 21135780]

約数ペア:

[(1, 21135780), (2, 10567890), (3, 7045260), (4, 5283945), (5, 4227156), (6, 3522630), (9, 2348420), (10, 2113578), (12, 1761315), (15, 1409052), (18, 1174210), (20, 1056789), (29, 728820), (30, 704526), (36, 587105), (45, 469684), (58, 364410), (60, 352263), (87, 242940), (90, 234842), (116, 182205), (145, 145764), (174, 121470), (180, 117421), (261, 80980), (290, 72882), (348, 60735), (435, 48588), (522, 40490), (580, 36441), (870, 24294), (1044, 20245), (1305, 16196), (1740, 12147), (2610, 8098), (4049, 5220)]