20218709875

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{5503}}^1$

素因数の和:5574

約数の個数: 128

約数和(自身を含む): 34619719680

約数和(自身を除く): 14401009805

約数列:

[1, 5, 7, 13, 17, 19, 25, 35, 65, 85, 91, 95, 119, 125, 133, 175, 221, 247, 323, 325, 425, 455, 475, 595, 665, 875, 1105, 1235, 1547, 1615, 1625, 1729, 2125, 2261, 2275, 2375, 2975, 3325, 4199, 5503, 5525, 6175, 7735, 8075, 8645, 11305, 11375, 14875, 16625, 20995, 27515, 27625, 29393, 30875, 38521, 38675, 40375, 43225, 56525, 71539, 93551, 104557, 104975, 137575, 146965, 192605, 193375, 216125, 282625, 357695, 467755, 500773, 522785, 524875, 654857, 687875, 731899, 734825, 963025, 1216163, 1359241, 1777469, 1788475, 2338775, 2503865, 2613925, 3274285, 3659495, 3674125, 4815125, 6080815, 6796205, 8513141, 8887345, 8942375, 9514687, 11693875, 12442283, 12519325, 13069625, 16371425, 18297475, 23107097, 30404075, 33981025, 42565705, 44436725, 47573435, 62211415, 62596625, 81857125, 91487375, 115535485, 152020375, 161749679, 169905125, 212828525, 222183625, 237867175, 311057075, 577677425, 808748395, 1064142625, 1189335875, 1555285375, 2888387125, 4043741975, 20218709875]

約数ペア:

[(1, 20218709875), (5, 4043741975), (7, 2888387125), (13, 1555285375), (17, 1189335875), (19, 1064142625), (25, 808748395), (35, 577677425), (65, 311057075), (85, 237867175), (91, 222183625), (95, 212828525), (119, 169905125), (125, 161749679), (133, 152020375), (175, 115535485), (221, 91487375), (247, 81857125), (323, 62596625), (325, 62211415), (425, 47573435), (455, 44436725), (475, 42565705), (595, 33981025), (665, 30404075), (875, 23107097), (1105, 18297475), (1235, 16371425), (1547, 13069625), (1615, 12519325), (1625, 12442283), (1729, 11693875), (2125, 9514687), (2261, 8942375), (2275, 8887345), (2375, 8513141), (2975, 6796205), (3325, 6080815), (4199, 4815125), (5503, 3674125), (5525, 3659495), (6175, 3274285), (7735, 2613925), (8075, 2503865), (8645, 2338775), (11305, 1788475), (11375, 1777469), (14875, 1359241), (16625, 1216163), (20995, 963025), (27515, 734825), (27625, 731899), (29393, 687875), (30875, 654857), (38521, 524875), (38675, 522785), (40375, 500773), (43225, 467755), (56525, 357695), (71539, 282625), (93551, 216125), (104557, 193375), (104975, 192605), (137575, 146965)]