19916955

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 37509120

約数和(自身を除く): 17592165

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 47, 73, 129, 135, 141, 215, 219, 235, 365, 387, 423, 645, 657, 705, 1095, 1161, 1269, 1935, 1971, 2021, 2115, 3139, 3285, 3431, 5805, 6063, 6345, 9417, 9855, 10105, 10293, 15695, 17155, 18189, 28251, 30315, 30879, 47085, 51465, 54567, 84753, 90945, 92637, 141255, 147533, 154395, 272835, 423765, 442599, 463185, 737665, 1327797, 2212995, 3983391, 6638985, 19916955]

約数ペア:

[(1, 19916955), (3, 6638985), (5, 3983391), (9, 2212995), (15, 1327797), (27, 737665), (43, 463185), (45, 442599), (47, 423765), (73, 272835), (129, 154395), (135, 147533), (141, 141255), (215, 92637), (219, 90945), (235, 84753), (365, 54567), (387, 51465), (423, 47085), (645, 30879), (657, 30315), (705, 28251), (1095, 18189), (1161, 17155), (1269, 15695), (1935, 10293), (1971, 10105), (2021, 9855), (2115, 9417), (3139, 6345), (3285, 6063), (3431, 5805)]