21217072

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{983}}^1$

素因数の和:1081

約数の個数: 40

約数和(自身を含む): 43925760

約数和(自身を除く): 22708688

約数列:

[1, 2, 4, 8, 16, 19, 38, 71, 76, 142, 152, 284, 304, 568, 983, 1136, 1349, 1966, 2698, 3932, 5396, 7864, 10792, 15728, 18677, 21584, 37354, 69793, 74708, 139586, 149416, 279172, 298832, 558344, 1116688, 1326067, 2652134, 5304268, 10608536, 21217072]

約数ペア:

[(1, 21217072), (2, 10608536), (4, 5304268), (8, 2652134), (16, 1326067), (19, 1116688), (38, 558344), (71, 298832), (76, 279172), (142, 149416), (152, 139586), (284, 74708), (304, 69793), (568, 37354), (983, 21584), (1136, 18677), (1349, 15728), (1966, 10792), (2698, 7864), (3932, 5396)]