20958340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{541}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 47804400

約数和(自身を除く): 26846060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 149, 260, 298, 541, 596, 745, 1082, 1490, 1937, 2164, 2705, 2980, 3874, 5410, 7033, 7748, 9685, 10820, 14066, 19370, 28132, 35165, 38740, 70330, 80609, 140660, 161218, 322436, 403045, 806090, 1047917, 1612180, 2095834, 4191668, 5239585, 10479170, 20958340]

約数ペア:

[(1, 20958340), (2, 10479170), (4, 5239585), (5, 4191668), (10, 2095834), (13, 1612180), (20, 1047917), (26, 806090), (52, 403045), (65, 322436), (130, 161218), (149, 140660), (260, 80609), (298, 70330), (541, 38740), (596, 35165), (745, 28132), (1082, 19370), (1490, 14066), (1937, 10820), (2164, 9685), (2705, 7748), (2980, 7033), (3874, 5410)]