21682480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:286

約数の個数: 80

約数和(自身を含む): 54237600

約数和(自身を除く): 32555120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 107, 136, 149, 170, 214, 272, 298, 340, 428, 535, 596, 680, 745, 856, 1070, 1192, 1360, 1490, 1712, 1819, 2140, 2384, 2533, 2980, 3638, 4280, 5066, 5960, 7276, 8560, 9095, 10132, 11920, 12665, 14552, 15943, 18190, 20264, 25330, 29104, 31886, 36380, 40528, 50660, 63772, 72760, 79715, 101320, 127544, 145520, 159430, 202640, 255088, 271031, 318860, 542062, 637720, 1084124, 1275440, 1355155, 2168248, 2710310, 4336496, 5420620, 10841240, 21682480]

約数ペア:

[(1, 21682480), (2, 10841240), (4, 5420620), (5, 4336496), (8, 2710310), (10, 2168248), (16, 1355155), (17, 1275440), (20, 1084124), (34, 637720), (40, 542062), (68, 318860), (80, 271031), (85, 255088), (107, 202640), (136, 159430), (149, 145520), (170, 127544), (214, 101320), (272, 79715), (298, 72760), (340, 63772), (428, 50660), (535, 40528), (596, 36380), (680, 31886), (745, 29104), (856, 25330), (1070, 20264), (1192, 18190), (1360, 15943), (1490, 14552), (1712, 12665), (1819, 11920), (2140, 10132), (2384, 9095), (2533, 8560), (2980, 7276), (3638, 5960), (4280, 5066)]