19915545

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 36578304

約数和(自身を除く): 16662759

約数列:

[1, 3, 5, 13, 15, 39, 41, 47, 53, 65, 123, 141, 159, 195, 205, 235, 265, 533, 611, 615, 689, 705, 795, 1599, 1833, 1927, 2067, 2173, 2491, 2665, 3055, 3445, 5781, 6519, 7473, 7995, 9165, 9635, 10335, 10865, 12455, 25051, 28249, 28905, 32383, 32595, 37365, 75153, 84747, 97149, 102131, 125255, 141245, 161915, 306393, 375765, 423735, 485745, 510655, 1327703, 1531965, 3983109, 6638515, 19915545]

約数ペア:

[(1, 19915545), (3, 6638515), (5, 3983109), (13, 1531965), (15, 1327703), (39, 510655), (41, 485745), (47, 423735), (53, 375765), (65, 306393), (123, 161915), (141, 141245), (159, 125255), (195, 102131), (205, 97149), (235, 84747), (265, 75153), (533, 37365), (611, 32595), (615, 32383), (689, 28905), (705, 28249), (795, 25051), (1599, 12455), (1833, 10865), (1927, 10335), (2067, 9635), (2173, 9165), (2491, 7995), (2665, 7473), (3055, 6519), (3445, 5781)]