1998411440

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^2\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:415

約数の個数: 120

約数和(自身を含む): 4861376352

約数和(自身を除く): 2862964912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 71, 74, 80, 142, 148, 185, 257, 284, 296, 355, 370, 514, 568, 592, 710, 740, 1028, 1136, 1285, 1369, 1420, 1480, 2056, 2570, 2627, 2738, 2840, 2960, 4112, 5140, 5254, 5476, 5680, 6845, 9509, 10280, 10508, 10952, 13135, 13690, 18247, 19018, 20560, 21016, 21904, 26270, 27380, 36494, 38036, 42032, 47545, 52540, 54760, 72988, 76072, 91235, 95090, 97199, 105080, 109520, 145976, 152144, 182470, 190180, 194398, 210160, 291952, 351833, 364940, 380360, 388796, 485995, 675139, 703666, 729880, 760720, 777592, 971990, 1350278, 1407332, 1459760, 1555184, 1759165, 1943980, 2700556, 2814664, 3375695, 3518330, 3887960, 5401112, 5629328, 6751390, 7036660, 7775920, 10802224, 13502780, 14073320, 24980143, 27005560, 28146640, 49960286, 54011120, 99920572, 124900715, 199841144, 249801430, 399682288, 499602860, 999205720, 1998411440]

約数ペア:

[(1, 1998411440), (2, 999205720), (4, 499602860), (5, 399682288), (8, 249801430), (10, 199841144), (16, 124900715), (20, 99920572), (37, 54011120), (40, 49960286), (71, 28146640), (74, 27005560), (80, 24980143), (142, 14073320), (148, 13502780), (185, 10802224), (257, 7775920), (284, 7036660), (296, 6751390), (355, 5629328), (370, 5401112), (514, 3887960), (568, 3518330), (592, 3375695), (710, 2814664), (740, 2700556), (1028, 1943980), (1136, 1759165), (1285, 1555184), (1369, 1459760), (1420, 1407332), (1480, 1350278), (2056, 971990), (2570, 777592), (2627, 760720), (2738, 729880), (2840, 703666), (2960, 675139), (4112, 485995), (5140, 388796), (5254, 380360), (5476, 364940), (5680, 351833), (6845, 291952), (9509, 210160), (10280, 194398), (10508, 190180), (10952, 182470), (13135, 152144), (13690, 145976), (18247, 109520), (19018, 105080), (20560, 97199), (21016, 95090), (21904, 91235), (26270, 76072), (27380, 72988), (36494, 54760), (38036, 52540), (42032, 47545)]