19880240

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3709}}^1$

素因数の和:3789

約数の個数: 40

約数和(自身を含む): 46924080

約数和(自身を除く): 27043840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3709, 5360, 7418, 14836, 18545, 29672, 37090, 59344, 74180, 148360, 248503, 296720, 497006, 994012, 1242515, 1988024, 2485030, 3976048, 4970060, 9940120, 19880240]

約数ペア:

[(1, 19880240), (2, 9940120), (4, 4970060), (5, 3976048), (8, 2485030), (10, 1988024), (16, 1242515), (20, 994012), (40, 497006), (67, 296720), (80, 248503), (134, 148360), (268, 74180), (335, 59344), (536, 37090), (670, 29672), (1072, 18545), (1340, 14836), (2680, 7418), (3709, 5360)]