19801380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{823}}^1$

素因数の和:1236

約数の個数: 48

約数和(自身を含む): 55649664

約数和(自身を除く): 35848284

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 401, 802, 823, 1203, 1604, 1646, 2005, 2406, 2469, 3292, 4010, 4115, 4812, 4938, 6015, 8020, 8230, 9876, 12030, 12345, 16460, 24060, 24690, 49380, 330023, 660046, 990069, 1320092, 1650115, 1980138, 3300230, 3960276, 4950345, 6600460, 9900690, 19801380]

約数ペア:

[(1, 19801380), (2, 9900690), (3, 6600460), (4, 4950345), (5, 3960276), (6, 3300230), (10, 1980138), (12, 1650115), (15, 1320092), (20, 990069), (30, 660046), (60, 330023), (401, 49380), (802, 24690), (823, 24060), (1203, 16460), (1604, 12345), (1646, 12030), (2005, 9876), (2406, 8230), (2469, 8020), (3292, 6015), (4010, 4938), (4115, 4812)]