21397128

素因数分解:

$2^3\times 3^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:542

約数の個数: 64

約数和(自身を含む): 56246400

約数和(自身を除く): 34849272

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 29, 58, 71, 87, 116, 142, 174, 213, 232, 284, 348, 426, 433, 568, 696, 852, 866, 1299, 1704, 1732, 2059, 2598, 3464, 4118, 5196, 6177, 8236, 10392, 12354, 12557, 16472, 24708, 25114, 30743, 37671, 49416, 50228, 61486, 75342, 92229, 100456, 122972, 150684, 184458, 245944, 301368, 368916, 737832, 891547, 1783094, 2674641, 3566188, 5349282, 7132376, 10698564, 21397128]

約数ペア:

[(1, 21397128), (2, 10698564), (3, 7132376), (4, 5349282), (6, 3566188), (8, 2674641), (12, 1783094), (24, 891547), (29, 737832), (58, 368916), (71, 301368), (87, 245944), (116, 184458), (142, 150684), (174, 122972), (213, 100456), (232, 92229), (284, 75342), (348, 61486), (426, 50228), (433, 49416), (568, 37671), (696, 30743), (852, 25114), (866, 24708), (1299, 16472), (1704, 12557), (1732, 12354), (2059, 10392), (2598, 8236), (3464, 6177), (4118, 5196)]