18991665

素因数分解:

$3^5\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1$

素因数の和:74

約数の個数: 144

約数和(自身を含む): 44815680

約数和(自身を除く): 25824015

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 29, 33, 35, 45, 49, 55, 63, 77, 81, 87, 99, 105, 135, 145, 147, 165, 189, 203, 231, 243, 245, 261, 297, 315, 319, 385, 405, 435, 441, 495, 539, 567, 609, 693, 735, 783, 891, 945, 957, 1015, 1155, 1215, 1305, 1323, 1421, 1485, 1595, 1617, 1701, 1827, 2079, 2205, 2233, 2349, 2673, 2695, 2835, 2871, 3045, 3465, 3915, 3969, 4263, 4455, 4785, 4851, 5481, 6237, 6615, 6699, 7047, 7105, 8085, 8505, 8613, 9135, 10395, 11165, 11745, 11907, 12789, 13365, 14355, 14553, 15631, 16443, 18711, 19845, 20097, 21315, 24255, 25839, 27405, 31185, 33495, 35235, 38367, 43065, 43659, 46893, 49329, 59535, 60291, 63945, 72765, 77517, 78155, 82215, 93555, 100485, 115101, 129195, 130977, 140679, 180873, 191835, 218295, 234465, 246645, 301455, 345303, 387585, 422037, 542619, 575505, 654885, 703395, 904365, 1266111, 1726515, 2110185, 2713095, 3798333, 6330555, 18991665]

約数ペア:

[(1, 18991665), (3, 6330555), (5, 3798333), (7, 2713095), (9, 2110185), (11, 1726515), (15, 1266111), (21, 904365), (27, 703395), (29, 654885), (33, 575505), (35, 542619), (45, 422037), (49, 387585), (55, 345303), (63, 301455), (77, 246645), (81, 234465), (87, 218295), (99, 191835), (105, 180873), (135, 140679), (145, 130977), (147, 129195), (165, 115101), (189, 100485), (203, 93555), (231, 82215), (243, 78155), (245, 77517), (261, 72765), (297, 63945), (315, 60291), (319, 59535), (385, 49329), (405, 46893), (435, 43659), (441, 43065), (495, 38367), (539, 35235), (567, 33495), (609, 31185), (693, 27405), (735, 25839), (783, 24255), (891, 21315), (945, 20097), (957, 19845), (1015, 18711), (1155, 16443), (1215, 15631), (1305, 14553), (1323, 14355), (1421, 13365), (1485, 12789), (1595, 11907), (1617, 11745), (1701, 11165), (1827, 10395), (2079, 9135), (2205, 8613), (2233, 8505), (2349, 8085), (2673, 7105), (2695, 7047), (2835, 6699), (2871, 6615), (3045, 6237), (3465, 5481), (3915, 4851), (3969, 4785), (4263, 4455)]