19878880

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17749}}^1$

素因数の和:17771

約数の個数: 48

約数和(自身を含む): 53676000

約数和(自身を除く): 33797120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17749, 35498, 70996, 88745, 124243, 141992, 177490, 248486, 283984, 354980, 496972, 567968, 621215, 709960, 993944, 1242430, 1419920, 1987888, 2484860, 2839840, 3975776, 4969720, 9939440, 19878880]

約数ペア:

[(1, 19878880), (2, 9939440), (4, 4969720), (5, 3975776), (7, 2839840), (8, 2484860), (10, 1987888), (14, 1419920), (16, 1242430), (20, 993944), (28, 709960), (32, 621215), (35, 567968), (40, 496972), (56, 354980), (70, 283984), (80, 248486), (112, 177490), (140, 141992), (160, 124243), (224, 88745), (280, 70996), (560, 35498), (1120, 17749)]