19892985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:230

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18814215

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 47, 87, 105, 139, 141, 145, 203, 235, 329, 417, 435, 609, 695, 705, 973, 987, 1015, 1363, 1645, 2085, 2919, 3045, 4031, 4089, 4865, 4935, 6533, 6815, 9541, 12093, 14595, 19599, 20155, 20445, 28217, 28623, 32665, 45731, 47705, 60465, 84651, 97995, 137193, 141085, 143115, 189457, 228655, 423255, 568371, 685965, 947285, 1326199, 2841855, 3978597, 6630995, 19892985]

約数ペア:

[(1, 19892985), (3, 6630995), (5, 3978597), (7, 2841855), (15, 1326199), (21, 947285), (29, 685965), (35, 568371), (47, 423255), (87, 228655), (105, 189457), (139, 143115), (141, 141085), (145, 137193), (203, 97995), (235, 84651), (329, 60465), (417, 47705), (435, 45731), (609, 32665), (695, 28623), (705, 28217), (973, 20445), (987, 20155), (1015, 19599), (1363, 14595), (1645, 12093), (2085, 9541), (2919, 6815), (3045, 6533), (4031, 4935), (4089, 4865)]