21630520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^2\times {\mathrm{643}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 50483160

約数和(自身を除く): 28852640

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 643, 841, 1160, 1286, 1682, 2572, 3215, 3364, 4205, 5144, 6430, 6728, 8410, 12860, 16820, 18647, 25720, 33640, 37294, 74588, 93235, 149176, 186470, 372940, 540763, 745880, 1081526, 2163052, 2703815, 4326104, 5407630, 10815260, 21630520]

約数ペア:

[(1, 21630520), (2, 10815260), (4, 5407630), (5, 4326104), (8, 2703815), (10, 2163052), (20, 1081526), (29, 745880), (40, 540763), (58, 372940), (116, 186470), (145, 149176), (232, 93235), (290, 74588), (580, 37294), (643, 33640), (841, 25720), (1160, 18647), (1286, 16820), (1682, 12860), (2572, 8410), (3215, 6728), (3364, 6430), (4205, 5144)]