19804005

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{349}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 37455600

約数和(自身を除く): 17651595

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 97, 117, 195, 291, 349, 485, 585, 873, 1047, 1261, 1455, 1745, 3141, 3783, 4365, 4537, 5235, 6305, 11349, 13611, 15705, 18915, 22685, 33853, 40833, 56745, 68055, 101559, 169265, 204165, 304677, 440089, 507795, 1320267, 1523385, 2200445, 3960801, 6601335, 19804005]

約数ペア:

[(1, 19804005), (3, 6601335), (5, 3960801), (9, 2200445), (13, 1523385), (15, 1320267), (39, 507795), (45, 440089), (65, 304677), (97, 204165), (117, 169265), (195, 101559), (291, 68055), (349, 56745), (485, 40833), (585, 33853), (873, 22685), (1047, 18915), (1261, 15705), (1455, 13611), (1745, 11349), (3141, 6305), (3783, 5235), (4365, 4537)]