20390552

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{757}}^1$

素因数の和:820

約数の個数: 64

約数和(自身を含む): 48390720

約数和(自身を除く): 28000168

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 37, 52, 56, 74, 91, 104, 148, 182, 259, 296, 364, 481, 518, 728, 757, 962, 1036, 1514, 1924, 2072, 3028, 3367, 3848, 5299, 6056, 6734, 9841, 10598, 13468, 19682, 21196, 26936, 28009, 39364, 42392, 56018, 68887, 78728, 112036, 137774, 196063, 224072, 275548, 364117, 392126, 551096, 728234, 784252, 1456468, 1568504, 2548819, 2912936, 5097638, 10195276, 20390552]

約数ペア:

[(1, 20390552), (2, 10195276), (4, 5097638), (7, 2912936), (8, 2548819), (13, 1568504), (14, 1456468), (26, 784252), (28, 728234), (37, 551096), (52, 392126), (56, 364117), (74, 275548), (91, 224072), (104, 196063), (148, 137774), (182, 112036), (259, 78728), (296, 68887), (364, 56018), (481, 42392), (518, 39364), (728, 28009), (757, 26936), (962, 21196), (1036, 19682), (1514, 13468), (1924, 10598), (2072, 9841), (3028, 6734), (3367, 6056), (3848, 5299)]