28148680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{439}}^1$

素因数の和:686

約数の個数: 64

約数和(自身を含む): 72864000

約数和(自身を除く): 44715320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 229, 280, 439, 458, 878, 916, 1145, 1603, 1756, 1832, 2195, 2290, 3073, 3206, 3512, 4390, 4580, 6146, 6412, 8015, 8780, 9160, 12292, 12824, 15365, 16030, 17560, 24584, 30730, 32060, 61460, 64120, 100531, 122920, 201062, 402124, 502655, 703717, 804248, 1005310, 1407434, 2010620, 2814868, 3518585, 4021240, 5629736, 7037170, 14074340, 28148680]

約数ペア:

[(1, 28148680), (2, 14074340), (4, 7037170), (5, 5629736), (7, 4021240), (8, 3518585), (10, 2814868), (14, 2010620), (20, 1407434), (28, 1005310), (35, 804248), (40, 703717), (56, 502655), (70, 402124), (140, 201062), (229, 122920), (280, 100531), (439, 64120), (458, 61460), (878, 32060), (916, 30730), (1145, 24584), (1603, 17560), (1756, 16030), (1832, 15365), (2195, 12824), (2290, 12292), (3073, 9160), (3206, 8780), (3512, 8015), (4390, 6412), (4580, 6146)]