12940120

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{3203}}^1$

素因数の和:3315

約数の個数: 32

約数和(自身を含む): 29412720

約数和(自身を除く): 16472600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 3203, 4040, 6406, 12812, 16015, 25624, 32030, 64060, 128120, 323503, 647006, 1294012, 1617515, 2588024, 3235030, 6470060, 12940120]

約数ペア:

[(1, 12940120), (2, 6470060), (4, 3235030), (5, 2588024), (8, 1617515), (10, 1294012), (20, 647006), (40, 323503), (101, 128120), (202, 64060), (404, 32030), (505, 25624), (808, 16015), (1010, 12812), (2020, 6406), (3203, 4040)]