21548020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{463}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 49109760

約数和(自身を除く): 27561740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 179, 260, 358, 463, 716, 895, 926, 1790, 1852, 2315, 2327, 3580, 4630, 4654, 6019, 9260, 9308, 11635, 12038, 23270, 24076, 30095, 46540, 60190, 82877, 120380, 165754, 331508, 414385, 828770, 1077401, 1657540, 2154802, 4309604, 5387005, 10774010, 21548020]

約数ペア:

[(1, 21548020), (2, 10774010), (4, 5387005), (5, 4309604), (10, 2154802), (13, 1657540), (20, 1077401), (26, 828770), (52, 414385), (65, 331508), (130, 165754), (179, 120380), (260, 82877), (358, 60190), (463, 46540), (716, 30095), (895, 24076), (926, 23270), (1790, 12038), (1852, 11635), (2315, 9308), (2327, 9260), (3580, 6019), (4630, 4654)]