20561697

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 33761728

約数和(自身を除く): 13200031

約数列:

[1, 3, 9, 13, 39, 43, 61, 67, 117, 129, 183, 201, 387, 549, 559, 603, 793, 871, 1677, 2379, 2613, 2623, 2881, 4087, 5031, 7137, 7839, 7869, 8643, 12261, 23607, 25929, 34099, 36783, 37453, 53131, 102297, 112359, 159393, 175741, 306891, 337077, 478179, 527223, 1581669, 2284633, 6853899, 20561697]

約数ペア:

[(1, 20561697), (3, 6853899), (9, 2284633), (13, 1581669), (39, 527223), (43, 478179), (61, 337077), (67, 306891), (117, 175741), (129, 159393), (183, 112359), (201, 102297), (387, 53131), (549, 37453), (559, 36783), (603, 34099), (793, 25929), (871, 23607), (1677, 12261), (2379, 8643), (2613, 7869), (2623, 7839), (2881, 7137), (4087, 5031)]