21368008

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{547}}^1$

素因数の和:829

約数の個数: 32

約数和(自身を含む): 42415200

約数和(自身を除く): 21047192

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 257, 514, 547, 1028, 1094, 2056, 2188, 4376, 4883, 9766, 10393, 19532, 20786, 39064, 41572, 83144, 140579, 281158, 562316, 1124632, 2671001, 5342002, 10684004, 21368008]

約数ペア:

[(1, 21368008), (2, 10684004), (4, 5342002), (8, 2671001), (19, 1124632), (38, 562316), (76, 281158), (152, 140579), (257, 83144), (514, 41572), (547, 39064), (1028, 20786), (1094, 19532), (2056, 10393), (2188, 9766), (4376, 4883)]