21156556905

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{77569}}^1$

素因数の和:77639

約数の個数: 96

約数和(自身を含む): 43563312000

約数和(自身を除く): 22406755095

約数列:

[1, 3, 5, 9, 11, 15, 19, 29, 33, 45, 55, 57, 87, 95, 99, 145, 165, 171, 209, 261, 285, 319, 435, 495, 551, 627, 855, 957, 1045, 1305, 1595, 1653, 1881, 2755, 2871, 3135, 4785, 4959, 6061, 8265, 9405, 14355, 18183, 24795, 30305, 54549, 77569, 90915, 232707, 272745, 387845, 698121, 853259, 1163535, 1473811, 2249501, 2559777, 3490605, 4266295, 4421433, 6748503, 7369055, 7679331, 11247505, 12798885, 13264299, 16211921, 20245509, 22107165, 24744511, 33742515, 38396655, 42740519, 48635763, 66321495, 74233533, 81059605, 101227545, 123722555, 128221557, 145907289, 213702595, 222700599, 243178815, 371167665, 384664671, 470145709, 641107785, 729536445, 1113502995, 1410437127, 1923323355, 2350728545, 4231311381, 7052185635, 21156556905]

約数ペア:

[(1, 21156556905), (3, 7052185635), (5, 4231311381), (9, 2350728545), (11, 1923323355), (15, 1410437127), (19, 1113502995), (29, 729536445), (33, 641107785), (45, 470145709), (55, 384664671), (57, 371167665), (87, 243178815), (95, 222700599), (99, 213702595), (145, 145907289), (165, 128221557), (171, 123722555), (209, 101227545), (261, 81059605), (285, 74233533), (319, 66321495), (435, 48635763), (495, 42740519), (551, 38396655), (627, 33742515), (855, 24744511), (957, 22107165), (1045, 20245509), (1305, 16211921), (1595, 13264299), (1653, 12798885), (1881, 11247505), (2755, 7679331), (2871, 7369055), (3135, 6748503), (4785, 4421433), (4959, 4266295), (6061, 3490605), (8265, 2559777), (9405, 2249501), (14355, 1473811), (18183, 1163535), (24795, 853259), (30305, 698121), (54549, 387845), (77569, 272745), (90915, 232707)]