21501445

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 32832000

約数和(自身を除く): 11330555

約数列:

[1, 5, 7, 19, 31, 35, 49, 95, 133, 149, 155, 217, 245, 589, 665, 745, 931, 1043, 1085, 1519, 2831, 2945, 4123, 4619, 4655, 5215, 7301, 7595, 14155, 19817, 20615, 23095, 28861, 32333, 36505, 87761, 99085, 138719, 144305, 161665, 226331, 438805, 614327, 693595, 1131655, 3071635, 4300289, 21501445]

約数ペア:

[(1, 21501445), (5, 4300289), (7, 3071635), (19, 1131655), (31, 693595), (35, 614327), (49, 438805), (95, 226331), (133, 161665), (149, 144305), (155, 138719), (217, 99085), (245, 87761), (589, 36505), (665, 32333), (745, 28861), (931, 23095), (1043, 20615), (1085, 19817), (1519, 14155), (2831, 7595), (2945, 7301), (4123, 5215), (4619, 4655)]