21137552

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:911

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 22252528

約数列:

[1, 2, 4, 8, 16, 23, 46, 71, 92, 142, 184, 284, 368, 568, 809, 1136, 1618, 1633, 3236, 3266, 6472, 6532, 12944, 13064, 18607, 26128, 37214, 57439, 74428, 114878, 148856, 229756, 297712, 459512, 919024, 1321097, 2642194, 5284388, 10568776, 21137552]

約数ペア:

[(1, 21137552), (2, 10568776), (4, 5284388), (8, 2642194), (16, 1321097), (23, 919024), (46, 459512), (71, 297712), (92, 229756), (142, 148856), (184, 114878), (284, 74428), (368, 57439), (568, 37214), (809, 26128), (1136, 18607), (1618, 13064), (1633, 12944), (3236, 6532), (3266, 6472)]