21280778820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16889507}}^1$

素因数の和:16889529

約数の個数: 72

約数和(自身を含む): 73773370944

約数和(自身を除く): 52492592124

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, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16889507, 33779014, 50668521, 67558028, 84447535, 101337042, 118226549, 152005563, 168895070, 202674084, 236453098, 253342605, 304011126, 337790140, 354679647, 472906196, 506685210, 591132745, 608022252, 709359294, 760027815, 1013370420, 1064038941, 1182265490, 1418718588, 1520055630, 1773398235, 2128077882, 2364530980, 3040111260, 3546796470, 4256155764, 5320194705, 7093592940, 10640389410, 21280778820]

約数ペア:

[(1, 21280778820), (2, 10640389410), (3, 7093592940), (4, 5320194705), (5, 4256155764), (6, 3546796470), (7, 3040111260), (9, 2364530980), (10, 2128077882), (12, 1773398235), (14, 1520055630), (15, 1418718588), (18, 1182265490), (20, 1064038941), (21, 1013370420), (28, 760027815), (30, 709359294), (35, 608022252), (36, 591132745), (42, 506685210), (45, 472906196), (60, 354679647), (63, 337790140), (70, 304011126), (84, 253342605), (90, 236453098), (105, 202674084), (126, 168895070), (140, 152005563), (180, 118226549), (210, 101337042), (252, 84447535), (315, 67558028), (420, 50668521), (630, 33779014), (1260, 16889507)]