20175161875

素因数分解:

$5^4\times {\mathrm{11}}^2\times {\mathrm{19}}^2\times {\mathrm{739}}^1$

素因数の和:819

約数の個数: 90

約数和(自身を含む): 29285953620

約数和(自身を除く): 9110791745

約数列:

[1, 5, 11, 19, 25, 55, 95, 121, 125, 209, 275, 361, 475, 605, 625, 739, 1045, 1375, 1805, 2299, 2375, 3025, 3695, 3971, 5225, 6875, 8129, 9025, 11495, 11875, 14041, 15125, 18475, 19855, 26125, 40645, 43681, 45125, 57475, 70205, 75625, 89419, 92375, 99275, 130625, 154451, 203225, 218405, 225625, 266779, 287375, 351025, 447095, 461875, 496375, 772255, 1016125, 1092025, 1333895, 1436875, 1698961, 1755125, 2235475, 2481875, 2934569, 3861275, 5080625, 5460125, 6669475, 8494805, 8775625, 11177375, 14672845, 19306375, 27300625, 32280259, 33347375, 42474025, 55886875, 73364225, 96531875, 161401295, 166736875, 212370125, 366821125, 807006475, 1061850625, 1834105625, 4035032375, 20175161875]

約数ペア:

[(1, 20175161875), (5, 4035032375), (11, 1834105625), (19, 1061850625), (25, 807006475), (55, 366821125), (95, 212370125), (121, 166736875), (125, 161401295), (209, 96531875), (275, 73364225), (361, 55886875), (475, 42474025), (605, 33347375), (625, 32280259), (739, 27300625), (1045, 19306375), (1375, 14672845), (1805, 11177375), (2299, 8775625), (2375, 8494805), (3025, 6669475), (3695, 5460125), (3971, 5080625), (5225, 3861275), (6875, 2934569), (8129, 2481875), (9025, 2235475), (11495, 1755125), (11875, 1698961), (14041, 1436875), (15125, 1333895), (18475, 1092025), (19855, 1016125), (26125, 772255), (40645, 496375), (43681, 461875), (45125, 447095), (57475, 351025), (70205, 287375), (75625, 266779), (89419, 225625), (92375, 218405), (99275, 203225), (130625, 154451)]