19988020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1303}}^1$

素因数の和:1384

約数の個数: 48

約数和(自身を含む): 46005120

約数和(自身を除く): 26017100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 236, 260, 295, 590, 767, 1180, 1303, 1534, 2606, 3068, 3835, 5212, 6515, 7670, 13030, 15340, 16939, 26060, 33878, 67756, 76877, 84695, 153754, 169390, 307508, 338780, 384385, 768770, 999401, 1537540, 1998802, 3997604, 4997005, 9994010, 19988020]

約数ペア:

[(1, 19988020), (2, 9994010), (4, 4997005), (5, 3997604), (10, 1998802), (13, 1537540), (20, 999401), (26, 768770), (52, 384385), (59, 338780), (65, 307508), (118, 169390), (130, 153754), (236, 84695), (260, 76877), (295, 67756), (590, 33878), (767, 26060), (1180, 16939), (1303, 15340), (1534, 13030), (2606, 7670), (3068, 6515), (3835, 5212)]