21368655

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{881}}^1$

素因数の和:917

約数の個数: 72

約数和(自身を含む): 47056464

約数和(自身を除く): 25687809

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 49, 55, 63, 77, 99, 105, 147, 165, 231, 245, 315, 385, 441, 495, 539, 693, 735, 881, 1155, 1617, 2205, 2643, 2695, 3465, 4405, 4851, 6167, 7929, 8085, 9691, 13215, 18501, 24255, 29073, 30835, 39645, 43169, 48455, 55503, 67837, 87219, 92505, 129507, 145365, 203511, 215845, 277515, 339185, 388521, 436095, 474859, 610533, 647535, 1017555, 1424577, 1942605, 2374295, 3052665, 4273731, 7122885, 21368655]

約数ペア:

[(1, 21368655), (3, 7122885), (5, 4273731), (7, 3052665), (9, 2374295), (11, 1942605), (15, 1424577), (21, 1017555), (33, 647535), (35, 610533), (45, 474859), (49, 436095), (55, 388521), (63, 339185), (77, 277515), (99, 215845), (105, 203511), (147, 145365), (165, 129507), (231, 92505), (245, 87219), (315, 67837), (385, 55503), (441, 48455), (495, 43169), (539, 39645), (693, 30835), (735, 29073), (881, 24255), (1155, 18501), (1617, 13215), (2205, 9691), (2643, 8085), (2695, 7929), (3465, 6167), (4405, 4851)]