20185220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{439}}^1$

素因数の和:489

約数の個数: 72

約数和(自身を含む): 49156800

約数和(自身を除く): 28971580

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 380, 418, 439, 484, 605, 836, 878, 1045, 1210, 1756, 2090, 2195, 2299, 2420, 4180, 4390, 4598, 4829, 8341, 8780, 9196, 9658, 11495, 16682, 19316, 22990, 24145, 33364, 41705, 45980, 48290, 53119, 83410, 91751, 96580, 106238, 166820, 183502, 212476, 265595, 367004, 458755, 531190, 917510, 1009261, 1062380, 1835020, 2018522, 4037044, 5046305, 10092610, 20185220]

約数ペア:

[(1, 20185220), (2, 10092610), (4, 5046305), (5, 4037044), (10, 2018522), (11, 1835020), (19, 1062380), (20, 1009261), (22, 917510), (38, 531190), (44, 458755), (55, 367004), (76, 265595), (95, 212476), (110, 183502), (121, 166820), (190, 106238), (209, 96580), (220, 91751), (242, 83410), (380, 53119), (418, 48290), (439, 45980), (484, 41705), (605, 33364), (836, 24145), (878, 22990), (1045, 19316), (1210, 16682), (1756, 11495), (2090, 9658), (2195, 9196), (2299, 8780), (2420, 8341), (4180, 4829), (4390, 4598)]