20739495

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 19580505

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 139, 145, 147, 203, 245, 343, 417, 435, 609, 695, 735, 973, 1015, 1029, 1421, 1715, 2085, 2919, 3045, 4031, 4263, 4865, 5145, 6811, 7105, 9947, 12093, 14595, 20155, 20433, 21315, 28217, 29841, 34055, 47677, 49735, 60465, 84651, 102165, 141085, 143031, 149205, 197519, 238385, 423255, 592557, 715155, 987595, 1382633, 2962785, 4147899, 6913165, 20739495]

約数ペア:

[(1, 20739495), (3, 6913165), (5, 4147899), (7, 2962785), (15, 1382633), (21, 987595), (29, 715155), (35, 592557), (49, 423255), (87, 238385), (105, 197519), (139, 149205), (145, 143031), (147, 141085), (203, 102165), (245, 84651), (343, 60465), (417, 49735), (435, 47677), (609, 34055), (695, 29841), (735, 28217), (973, 21315), (1015, 20433), (1029, 20155), (1421, 14595), (1715, 12093), (2085, 9947), (2919, 7105), (3045, 6811), (4031, 5145), (4263, 4865)]