28991920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{8839}}^1$

素因数の和:8893

約数の個数: 40

約数和(自身を含む): 69058080

約数和(自身を除く): 40066160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 8839, 17678, 35356, 44195, 70712, 88390, 141424, 176780, 353560, 362399, 707120, 724798, 1449596, 1811995, 2899192, 3623990, 5798384, 7247980, 14495960, 28991920]

約数ペア:

[(1, 28991920), (2, 14495960), (4, 7247980), (5, 5798384), (8, 3623990), (10, 2899192), (16, 1811995), (20, 1449596), (40, 724798), (41, 707120), (80, 362399), (82, 353560), (164, 176780), (205, 141424), (328, 88390), (410, 70712), (656, 44195), (820, 35356), (1640, 17678), (3280, 8839)]