20458000

素因数分解:

$2^4\times 5^3\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:269

約数の個数: 80

約数和(自身を含む): 50661936

約数和(自身を除く): 30203936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 53, 80, 100, 106, 125, 193, 200, 212, 250, 265, 386, 400, 424, 500, 530, 772, 848, 965, 1000, 1060, 1325, 1544, 1930, 2000, 2120, 2650, 3088, 3860, 4240, 4825, 5300, 6625, 7720, 9650, 10229, 10600, 13250, 15440, 19300, 20458, 21200, 24125, 26500, 38600, 40916, 48250, 51145, 53000, 77200, 81832, 96500, 102290, 106000, 163664, 193000, 204580, 255725, 386000, 409160, 511450, 818320, 1022900, 1278625, 2045800, 2557250, 4091600, 5114500, 10229000, 20458000]

約数ペア:

[(1, 20458000), (2, 10229000), (4, 5114500), (5, 4091600), (8, 2557250), (10, 2045800), (16, 1278625), (20, 1022900), (25, 818320), (40, 511450), (50, 409160), (53, 386000), (80, 255725), (100, 204580), (106, 193000), (125, 163664), (193, 106000), (200, 102290), (212, 96500), (250, 81832), (265, 77200), (386, 53000), (400, 51145), (424, 48250), (500, 40916), (530, 38600), (772, 26500), (848, 24125), (965, 21200), (1000, 20458), (1060, 19300), (1325, 15440), (1544, 13250), (1930, 10600), (2000, 10229), (2120, 9650), (2650, 7720), (3088, 6625), (3860, 5300), (4240, 4825)]