19552780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{479}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 44593920

約数和(自身を除く): 25041140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 479, 628, 785, 958, 1570, 1916, 2041, 2395, 3140, 4082, 4790, 6227, 8164, 9580, 10205, 12454, 20410, 24908, 31135, 40820, 62270, 75203, 124540, 150406, 300812, 376015, 752030, 977639, 1504060, 1955278, 3910556, 4888195, 9776390, 19552780]

約数ペア:

[(1, 19552780), (2, 9776390), (4, 4888195), (5, 3910556), (10, 1955278), (13, 1504060), (20, 977639), (26, 752030), (52, 376015), (65, 300812), (130, 150406), (157, 124540), (260, 75203), (314, 62270), (479, 40820), (628, 31135), (785, 24908), (958, 20410), (1570, 12454), (1916, 10205), (2041, 9580), (2395, 8164), (3140, 6227), (4082, 4790)]