20456540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:183

約数の個数: 96

約数和(自身を含む): 50379840

約数和(自身を除く): 29923300

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 41, 52, 65, 76, 82, 95, 101, 130, 164, 190, 202, 205, 247, 260, 380, 404, 410, 494, 505, 533, 779, 820, 988, 1010, 1066, 1235, 1313, 1558, 1919, 2020, 2132, 2470, 2626, 2665, 3116, 3838, 3895, 4141, 4940, 5252, 5330, 6565, 7676, 7790, 8282, 9595, 10127, 10660, 13130, 15580, 16564, 19190, 20254, 20705, 24947, 26260, 38380, 40508, 41410, 49894, 50635, 53833, 78679, 82820, 99788, 101270, 107666, 124735, 157358, 202540, 215332, 249470, 269165, 314716, 393395, 498940, 538330, 786790, 1022827, 1076660, 1573580, 2045654, 4091308, 5114135, 10228270, 20456540]

約数ペア:

[(1, 20456540), (2, 10228270), (4, 5114135), (5, 4091308), (10, 2045654), (13, 1573580), (19, 1076660), (20, 1022827), (26, 786790), (38, 538330), (41, 498940), (52, 393395), (65, 314716), (76, 269165), (82, 249470), (95, 215332), (101, 202540), (130, 157358), (164, 124735), (190, 107666), (202, 101270), (205, 99788), (247, 82820), (260, 78679), (380, 53833), (404, 50635), (410, 49894), (494, 41410), (505, 40508), (533, 38380), (779, 26260), (820, 24947), (988, 20705), (1010, 20254), (1066, 19190), (1235, 16564), (1313, 15580), (1558, 13130), (1919, 10660), (2020, 10127), (2132, 9595), (2470, 8282), (2626, 7790), (2665, 7676), (3116, 6565), (3838, 5330), (3895, 5252), (4141, 4940)]