20407672

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:188

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 22446728

約数列:

[1, 2, 4, 8, 19, 31, 38, 61, 62, 71, 76, 122, 124, 142, 152, 244, 248, 284, 488, 568, 589, 1159, 1178, 1349, 1891, 2201, 2318, 2356, 2698, 3782, 4331, 4402, 4636, 4712, 5396, 7564, 8662, 8804, 9272, 10792, 15128, 17324, 17608, 34648, 35929, 41819, 71858, 82289, 83638, 134261, 143716, 164578, 167276, 268522, 287432, 329156, 334552, 537044, 658312, 1074088, 2550959, 5101918, 10203836, 20407672]

約数ペア:

[(1, 20407672), (2, 10203836), (4, 5101918), (8, 2550959), (19, 1074088), (31, 658312), (38, 537044), (61, 334552), (62, 329156), (71, 287432), (76, 268522), (122, 167276), (124, 164578), (142, 143716), (152, 134261), (244, 83638), (248, 82289), (284, 71858), (488, 41819), (568, 35929), (589, 34648), (1159, 17608), (1178, 17324), (1349, 15128), (1891, 10792), (2201, 9272), (2318, 8804), (2356, 8662), (2698, 7564), (3782, 5396), (4331, 4712), (4402, 4636)]