18378640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:944

約数の個数: 80

約数和(自身を含む): 50211072

約数和(自身を除く): 31832432

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 887, 1036, 1295, 1480, 1774, 2072, 2590, 2960, 3548, 4144, 4435, 5180, 6209, 7096, 8870, 10360, 12418, 14192, 17740, 20720, 24836, 31045, 32819, 35480, 49672, 62090, 65638, 70960, 99344, 124180, 131276, 164095, 229733, 248360, 262552, 328190, 459466, 496720, 525104, 656380, 918932, 1148665, 1312760, 1837864, 2297330, 2625520, 3675728, 4594660, 9189320, 18378640]

約数ペア:

[(1, 18378640), (2, 9189320), (4, 4594660), (5, 3675728), (7, 2625520), (8, 2297330), (10, 1837864), (14, 1312760), (16, 1148665), (20, 918932), (28, 656380), (35, 525104), (37, 496720), (40, 459466), (56, 328190), (70, 262552), (74, 248360), (80, 229733), (112, 164095), (140, 131276), (148, 124180), (185, 99344), (259, 70960), (280, 65638), (296, 62090), (370, 49672), (518, 35480), (560, 32819), (592, 31045), (740, 24836), (887, 20720), (1036, 17740), (1295, 14192), (1480, 12418), (1774, 10360), (2072, 8870), (2590, 7096), (2960, 6209), (3548, 5180), (4144, 4435)]