19982170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 41658624

約数和(自身を除く): 21676454

約数列:

[1, 2, 5, 10, 13, 23, 26, 41, 46, 65, 82, 115, 130, 163, 205, 230, 299, 326, 410, 533, 598, 815, 943, 1066, 1495, 1630, 1886, 2119, 2665, 2990, 3749, 4238, 4715, 5330, 6683, 7498, 9430, 10595, 12259, 13366, 18745, 21190, 24518, 33415, 37490, 48737, 61295, 66830, 86879, 97474, 122590, 153709, 173758, 243685, 307418, 434395, 487370, 768545, 868790, 1537090, 1998217, 3996434, 9991085, 19982170]

約数ペア:

[(1, 19982170), (2, 9991085), (5, 3996434), (10, 1998217), (13, 1537090), (23, 868790), (26, 768545), (41, 487370), (46, 434395), (65, 307418), (82, 243685), (115, 173758), (130, 153709), (163, 122590), (205, 97474), (230, 86879), (299, 66830), (326, 61295), (410, 48737), (533, 37490), (598, 33415), (815, 24518), (943, 21190), (1066, 18745), (1495, 13366), (1630, 12259), (1886, 10595), (2119, 9430), (2665, 7498), (2990, 6683), (3749, 5330), (4238, 4715)]