21257990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{9619}}^1$

素因数の和:9656

約数の個数: 32

約数和(自身を含む): 43636320

約数和(自身を除く): 22378330

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 170, 221, 442, 1105, 2210, 9619, 19238, 48095, 96190, 125047, 163523, 250094, 327046, 625235, 817615, 1250470, 1635230, 2125799, 4251598, 10628995, 21257990]

約数ペア:

[(1, 21257990), (2, 10628995), (5, 4251598), (10, 2125799), (13, 1635230), (17, 1250470), (26, 817615), (34, 625235), (65, 327046), (85, 250094), (130, 163523), (170, 125047), (221, 96190), (442, 48095), (1105, 19238), (2210, 9619)]