28161520

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20707}}^1$

素因数の和:20737

約数の個数: 40

約数和(自身を含む): 69330384

約数和(自身を除く): 41168864

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 20707, 41414, 82828, 103535, 165656, 207070, 331312, 352019, 414140, 704038, 828280, 1408076, 1656560, 1760095, 2816152, 3520190, 5632304, 7040380, 14080760, 28161520]

約数ペア:

[(1, 28161520), (2, 14080760), (4, 7040380), (5, 5632304), (8, 3520190), (10, 2816152), (16, 1760095), (17, 1656560), (20, 1408076), (34, 828280), (40, 704038), (68, 414140), (80, 352019), (85, 331312), (136, 207070), (170, 165656), (272, 103535), (340, 82828), (680, 41414), (1360, 20707)]