21511140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51217}}^1$

素因数の和:51236

約数の個数: 48

約数和(自身を含む): 68836992

約数和(自身を除く): 47325852

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51217, 102434, 153651, 204868, 256085, 307302, 358519, 512170, 614604, 717038, 768255, 1024340, 1075557, 1434076, 1536510, 1792595, 2151114, 3073020, 3585190, 4302228, 5377785, 7170380, 10755570, 21511140]

約数ペア:

[(1, 21511140), (2, 10755570), (3, 7170380), (4, 5377785), (5, 4302228), (6, 3585190), (7, 3073020), (10, 2151114), (12, 1792595), (14, 1536510), (15, 1434076), (20, 1075557), (21, 1024340), (28, 768255), (30, 717038), (35, 614604), (42, 512170), (60, 358519), (70, 307302), (84, 256085), (105, 204868), (140, 153651), (210, 102434), (420, 51217)]