19985625

素因数分解:

$3^2\times 5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:73

約数の個数: 120

約数和(自身を含む): 43860960

約数和(自身を除く): 23875335

約数列:

[1, 3, 5, 9, 11, 15, 17, 19, 25, 33, 45, 51, 55, 57, 75, 85, 95, 99, 125, 153, 165, 171, 187, 209, 225, 255, 275, 285, 323, 375, 425, 475, 495, 561, 625, 627, 765, 825, 855, 935, 969, 1045, 1125, 1275, 1375, 1425, 1615, 1683, 1875, 1881, 2125, 2375, 2475, 2805, 2907, 3135, 3553, 3825, 4125, 4275, 4675, 4845, 5225, 5625, 6375, 6875, 7125, 8075, 8415, 9405, 10625, 10659, 11875, 12375, 14025, 14535, 15675, 17765, 19125, 20625, 21375, 23375, 24225, 26125, 31875, 31977, 35625, 40375, 42075, 47025, 53295, 61875, 70125, 72675, 78375, 88825, 95625, 106875, 116875, 121125, 130625, 159885, 201875, 210375, 235125, 266475, 350625, 363375, 391875, 444125, 605625, 799425, 1051875, 1175625, 1332375, 1816875, 2220625, 3997125, 6661875, 19985625]

約数ペア:

[(1, 19985625), (3, 6661875), (5, 3997125), (9, 2220625), (11, 1816875), (15, 1332375), (17, 1175625), (19, 1051875), (25, 799425), (33, 605625), (45, 444125), (51, 391875), (55, 363375), (57, 350625), (75, 266475), (85, 235125), (95, 210375), (99, 201875), (125, 159885), (153, 130625), (165, 121125), (171, 116875), (187, 106875), (209, 95625), (225, 88825), (255, 78375), (275, 72675), (285, 70125), (323, 61875), (375, 53295), (425, 47025), (475, 42075), (495, 40375), (561, 35625), (625, 31977), (627, 31875), (765, 26125), (825, 24225), (855, 23375), (935, 21375), (969, 20625), (1045, 19125), (1125, 17765), (1275, 15675), (1375, 14535), (1425, 14025), (1615, 12375), (1683, 11875), (1875, 10659), (1881, 10625), (2125, 9405), (2375, 8415), (2475, 8075), (2805, 7125), (2907, 6875), (3135, 6375), (3553, 5625), (3825, 5225), (4125, 4845), (4275, 4675)]