19380640

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1361}}^1$

素因数の和:1465

約数の個数: 48

約数和(自身を含む): 46335240

約数和(自身を除く): 26954600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1361, 1424, 1780, 2722, 2848, 3560, 5444, 6805, 7120, 10888, 13610, 14240, 21776, 27220, 43552, 54440, 108880, 121129, 217760, 242258, 484516, 605645, 969032, 1211290, 1938064, 2422580, 3876128, 4845160, 9690320, 19380640]

約数ペア:

[(1, 19380640), (2, 9690320), (4, 4845160), (5, 3876128), (8, 2422580), (10, 1938064), (16, 1211290), (20, 969032), (32, 605645), (40, 484516), (80, 242258), (89, 217760), (160, 121129), (178, 108880), (356, 54440), (445, 43552), (712, 27220), (890, 21776), (1361, 14240), (1424, 13610), (1780, 10888), (2722, 7120), (2848, 6805), (3560, 5444)]