90488080

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:352

約数の個数: 80

約数和(自身を含む): 216950400

約数和(自身を除く): 126462320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 89, 142, 178, 179, 284, 355, 356, 358, 445, 568, 710, 712, 716, 890, 895, 1136, 1420, 1424, 1432, 1780, 1790, 2840, 2864, 3560, 3580, 5680, 6319, 7120, 7160, 12638, 12709, 14320, 15931, 25276, 25418, 31595, 31862, 50552, 50836, 63190, 63545, 63724, 79655, 101104, 101672, 126380, 127090, 127448, 159310, 203344, 252760, 254180, 254896, 318620, 505520, 508360, 637240, 1016720, 1131101, 1274480, 2262202, 4524404, 5655505, 9048808, 11311010, 18097616, 22622020, 45244040, 90488080]

約数ペア:

[(1, 90488080), (2, 45244040), (4, 22622020), (5, 18097616), (8, 11311010), (10, 9048808), (16, 5655505), (20, 4524404), (40, 2262202), (71, 1274480), (80, 1131101), (89, 1016720), (142, 637240), (178, 508360), (179, 505520), (284, 318620), (355, 254896), (356, 254180), (358, 252760), (445, 203344), (568, 159310), (710, 127448), (712, 127090), (716, 126380), (890, 101672), (895, 101104), (1136, 79655), (1420, 63724), (1424, 63545), (1432, 63190), (1780, 50836), (1790, 50552), (2840, 31862), (2864, 31595), (3560, 25418), (3580, 25276), (5680, 15931), (6319, 14320), (7120, 12709), (7160, 12638)]