27991990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{1321}}^1$

素因数の和:1504

約数の個数: 32

約数和(自身を含む): 54635616

約数和(自身を除く): 26643626

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163, 326, 815, 1321, 1630, 2119, 2642, 4238, 6605, 10595, 13210, 17173, 21190, 34346, 85865, 171730, 215323, 430646, 1076615, 2153230, 2799199, 5598398, 13995995, 27991990]

約数ペア:

[(1, 27991990), (2, 13995995), (5, 5598398), (10, 2799199), (13, 2153230), (26, 1076615), (65, 430646), (130, 215323), (163, 171730), (326, 85865), (815, 34346), (1321, 21190), (1630, 17173), (2119, 13210), (2642, 10595), (4238, 6605)]