19859180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4751}}^1$

素因数の和:4790

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 28040980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4751, 9502, 19004, 23755, 47510, 52261, 90269, 95020, 104522, 180538, 209044, 261305, 361076, 451345, 522610, 902690, 992959, 1045220, 1805380, 1985918, 3971836, 4964795, 9929590, 19859180]

約数ペア:

[(1, 19859180), (2, 9929590), (4, 4964795), (5, 3971836), (10, 1985918), (11, 1805380), (19, 1045220), (20, 992959), (22, 902690), (38, 522610), (44, 451345), (55, 361076), (76, 261305), (95, 209044), (110, 180538), (190, 104522), (209, 95020), (220, 90269), (380, 52261), (418, 47510), (836, 23755), (1045, 19004), (2090, 9502), (4180, 4751)]