21381420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{367}}^1\times {\mathrm{971}}^1$

素因数の和:1350

約数の個数: 48

約数和(自身を含む): 60092928

約数和(自身を除く): 38711508

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 367, 734, 971, 1101, 1468, 1835, 1942, 2202, 2913, 3670, 3884, 4404, 4855, 5505, 5826, 7340, 9710, 11010, 11652, 14565, 19420, 22020, 29130, 58260, 356357, 712714, 1069071, 1425428, 1781785, 2138142, 3563570, 4276284, 5345355, 7127140, 10690710, 21381420]

約数ペア:

[(1, 21381420), (2, 10690710), (3, 7127140), (4, 5345355), (5, 4276284), (6, 3563570), (10, 2138142), (12, 1781785), (15, 1425428), (20, 1069071), (30, 712714), (60, 356357), (367, 58260), (734, 29130), (971, 22020), (1101, 19420), (1468, 14565), (1835, 11652), (1942, 11010), (2202, 9710), (2913, 7340), (3670, 5826), (3884, 5505), (4404, 4855)]