21986685

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{313}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 43889664

約数和(自身を除く): 21902979

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 223, 313, 315, 669, 939, 1115, 1561, 1565, 2007, 2191, 2817, 3345, 4683, 4695, 6573, 7805, 10035, 10955, 14049, 14085, 19719, 23415, 32865, 69799, 70245, 98595, 209397, 348995, 488593, 628191, 1046985, 1465779, 2442965, 3140955, 4397337, 7328895, 21986685]

約数ペア:

[(1, 21986685), (3, 7328895), (5, 4397337), (7, 3140955), (9, 2442965), (15, 1465779), (21, 1046985), (35, 628191), (45, 488593), (63, 348995), (105, 209397), (223, 98595), (313, 70245), (315, 69799), (669, 32865), (939, 23415), (1115, 19719), (1561, 14085), (1565, 14049), (2007, 10955), (2191, 10035), (2817, 7805), (3345, 6573), (4683, 4695)]