19979925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2003}}^1$

素因数の和:2042

約数の個数: 48

約数和(自身を含む): 39759360

約数和(自身を除く): 19779435

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 133, 175, 285, 399, 475, 525, 665, 1425, 1995, 2003, 3325, 6009, 9975, 10015, 14021, 30045, 38057, 42063, 50075, 70105, 114171, 150225, 190285, 210315, 266399, 350525, 570855, 799197, 951425, 1051575, 1331995, 2854275, 3995985, 6659975, 19979925]

約数ペア:

[(1, 19979925), (3, 6659975), (5, 3995985), (7, 2854275), (15, 1331995), (19, 1051575), (21, 951425), (25, 799197), (35, 570855), (57, 350525), (75, 266399), (95, 210315), (105, 190285), (133, 150225), (175, 114171), (285, 70105), (399, 50075), (475, 42063), (525, 38057), (665, 30045), (1425, 14021), (1995, 10015), (2003, 9975), (3325, 6009)]