21078780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4447}}^1$

素因数の和:4538

約数の個数: 48

約数和(自身を含む): 59781120

約数和(自身を除く): 38702340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 79, 158, 237, 316, 395, 474, 790, 948, 1185, 1580, 2370, 4447, 4740, 8894, 13341, 17788, 22235, 26682, 44470, 53364, 66705, 88940, 133410, 266820, 351313, 702626, 1053939, 1405252, 1756565, 2107878, 3513130, 4215756, 5269695, 7026260, 10539390, 21078780]

約数ペア:

[(1, 21078780), (2, 10539390), (3, 7026260), (4, 5269695), (5, 4215756), (6, 3513130), (10, 2107878), (12, 1756565), (15, 1405252), (20, 1053939), (30, 702626), (60, 351313), (79, 266820), (158, 133410), (237, 88940), (316, 66705), (395, 53364), (474, 44470), (790, 26682), (948, 22235), (1185, 17788), (1580, 13341), (2370, 8894), (4447, 4740)]