28991000

素因数分解:

$2^3\times 5^3\times {\mathrm{53}}^1\times {\mathrm{547}}^1$

素因数の和:621

約数の個数: 64

約数和(自身を含む): 69245280

約数和(自身を除く): 40254280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 53, 100, 106, 125, 200, 212, 250, 265, 424, 500, 530, 547, 1000, 1060, 1094, 1325, 2120, 2188, 2650, 2735, 4376, 5300, 5470, 6625, 10600, 10940, 13250, 13675, 21880, 26500, 27350, 28991, 53000, 54700, 57982, 68375, 109400, 115964, 136750, 144955, 231928, 273500, 289910, 547000, 579820, 724775, 1159640, 1449550, 2899100, 3623875, 5798200, 7247750, 14495500, 28991000]

約数ペア:

[(1, 28991000), (2, 14495500), (4, 7247750), (5, 5798200), (8, 3623875), (10, 2899100), (20, 1449550), (25, 1159640), (40, 724775), (50, 579820), (53, 547000), (100, 289910), (106, 273500), (125, 231928), (200, 144955), (212, 136750), (250, 115964), (265, 109400), (424, 68375), (500, 57982), (530, 54700), (547, 53000), (1000, 28991), (1060, 27350), (1094, 26500), (1325, 21880), (2120, 13675), (2188, 13250), (2650, 10940), (2735, 10600), (4376, 6625), (5300, 5470)]