21503510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{1109}}^1$

素因数の和:1400

約数の個数: 32

約数和(自身を含む): 44435520

約数和(自身を除く): 22932010

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 277, 554, 1109, 1385, 1939, 2218, 2770, 3878, 5545, 7763, 9695, 11090, 15526, 19390, 38815, 77630, 307193, 614386, 1535965, 2150351, 3071930, 4300702, 10751755, 21503510]

約数ペア:

[(1, 21503510), (2, 10751755), (5, 4300702), (7, 3071930), (10, 2150351), (14, 1535965), (35, 614386), (70, 307193), (277, 77630), (554, 38815), (1109, 19390), (1385, 15526), (1939, 11090), (2218, 9695), (2770, 7763), (3878, 5545)]