19774820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4003}}^1$

素因数の和:4044

約数の個数: 48

約数和(自身を含む): 47087040

約数和(自身を除く): 27312220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4003, 4940, 8006, 16012, 20015, 40030, 52039, 76057, 80060, 104078, 152114, 208156, 260195, 304228, 380285, 520390, 760570, 988741, 1040780, 1521140, 1977482, 3954964, 4943705, 9887410, 19774820]

約数ペア:

[(1, 19774820), (2, 9887410), (4, 4943705), (5, 3954964), (10, 1977482), (13, 1521140), (19, 1040780), (20, 988741), (26, 760570), (38, 520390), (52, 380285), (65, 304228), (76, 260195), (95, 208156), (130, 152114), (190, 104078), (247, 80060), (260, 76057), (380, 52039), (494, 40030), (988, 20015), (1235, 16012), (2470, 8006), (4003, 4940)]