20961560

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27581}}^1$

素因数の和:27611

約数の個数: 32

約数和(自身を含む): 49647600

約数和(自身を除く): 28686040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27581, 55162, 110324, 137905, 220648, 275810, 524039, 551620, 1048078, 1103240, 2096156, 2620195, 4192312, 5240390, 10480780, 20961560]

約数ペア:

[(1, 20961560), (2, 10480780), (4, 5240390), (5, 4192312), (8, 2620195), (10, 2096156), (19, 1103240), (20, 1048078), (38, 551620), (40, 524039), (76, 275810), (95, 220648), (152, 137905), (190, 110324), (380, 55162), (760, 27581)]