990640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:110

約数の個数: 80

約数和(自身を含む): 2767680

約数和(自身を除く): 1777040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 61, 70, 80, 112, 116, 122, 140, 145, 203, 232, 244, 280, 290, 305, 406, 427, 464, 488, 560, 580, 610, 812, 854, 976, 1015, 1160, 1220, 1624, 1708, 1769, 2030, 2135, 2320, 2440, 3248, 3416, 3538, 4060, 4270, 4880, 6832, 7076, 8120, 8540, 8845, 12383, 14152, 16240, 17080, 17690, 24766, 28304, 34160, 35380, 49532, 61915, 70760, 99064, 123830, 141520, 198128, 247660, 495320, 990640]

約数ペア:

[(1, 990640), (2, 495320), (4, 247660), (5, 198128), (7, 141520), (8, 123830), (10, 99064), (14, 70760), (16, 61915), (20, 49532), (28, 35380), (29, 34160), (35, 28304), (40, 24766), (56, 17690), (58, 17080), (61, 16240), (70, 14152), (80, 12383), (112, 8845), (116, 8540), (122, 8120), (140, 7076), (145, 6832), (203, 4880), (232, 4270), (244, 4060), (280, 3538), (290, 3416), (305, 3248), (406, 2440), (427, 2320), (464, 2135), (488, 2030), (560, 1769), (580, 1708), (610, 1624), (812, 1220), (854, 1160), (976, 1015)]