20455875

素因数分解:

$3^3\times 5^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:83

約数の個数: 128

約数和(自身を含む): 44928000

約数和(自身を除く): 24472125

約数列:

[1, 3, 5, 9, 11, 15, 19, 25, 27, 29, 33, 45, 55, 57, 75, 87, 95, 99, 125, 135, 145, 165, 171, 209, 225, 261, 275, 285, 297, 319, 375, 435, 475, 495, 513, 551, 627, 675, 725, 783, 825, 855, 957, 1045, 1125, 1305, 1375, 1425, 1485, 1595, 1653, 1881, 2175, 2375, 2475, 2565, 2755, 2871, 3135, 3375, 3625, 3915, 4125, 4275, 4785, 4959, 5225, 5643, 6061, 6525, 7125, 7425, 7975, 8265, 8613, 9405, 10875, 12375, 12825, 13775, 14355, 14877, 15675, 18183, 19575, 21375, 23925, 24795, 26125, 28215, 30305, 32625, 37125, 39875, 41325, 43065, 47025, 54549, 64125, 68875, 71775, 74385, 78375, 90915, 97875, 119625, 123975, 141075, 151525, 163647, 206625, 215325, 235125, 272745, 358875, 371925, 454575, 619875, 705375, 757625, 818235, 1076625, 1363725, 1859625, 2272875, 4091175, 6818625, 20455875]

約数ペア:

[(1, 20455875), (3, 6818625), (5, 4091175), (9, 2272875), (11, 1859625), (15, 1363725), (19, 1076625), (25, 818235), (27, 757625), (29, 705375), (33, 619875), (45, 454575), (55, 371925), (57, 358875), (75, 272745), (87, 235125), (95, 215325), (99, 206625), (125, 163647), (135, 151525), (145, 141075), (165, 123975), (171, 119625), (209, 97875), (225, 90915), (261, 78375), (275, 74385), (285, 71775), (297, 68875), (319, 64125), (375, 54549), (435, 47025), (475, 43065), (495, 41325), (513, 39875), (551, 37125), (627, 32625), (675, 30305), (725, 28215), (783, 26125), (825, 24795), (855, 23925), (957, 21375), (1045, 19575), (1125, 18183), (1305, 15675), (1375, 14877), (1425, 14355), (1485, 13775), (1595, 12825), (1653, 12375), (1881, 10875), (2175, 9405), (2375, 8613), (2475, 8265), (2565, 7975), (2755, 7425), (2871, 7125), (3135, 6525), (3375, 6061), (3625, 5643), (3915, 5225), (4125, 4959), (4275, 4785)]