21615520

素因数分解:

$2^5\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2549}}^1$

素因数の和:2617

約数の個数: 48

約数和(自身を含む): 52050600

約数和(自身を除く): 30435080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 80, 106, 160, 212, 265, 424, 530, 848, 1060, 1696, 2120, 2549, 4240, 5098, 8480, 10196, 12745, 20392, 25490, 40784, 50980, 81568, 101960, 135097, 203920, 270194, 407840, 540388, 675485, 1080776, 1350970, 2161552, 2701940, 4323104, 5403880, 10807760, 21615520]

約数ペア:

[(1, 21615520), (2, 10807760), (4, 5403880), (5, 4323104), (8, 2701940), (10, 2161552), (16, 1350970), (20, 1080776), (32, 675485), (40, 540388), (53, 407840), (80, 270194), (106, 203920), (160, 135097), (212, 101960), (265, 81568), (424, 50980), (530, 40784), (848, 25490), (1060, 20392), (1696, 12745), (2120, 10196), (2549, 8480), (4240, 5098)]