21309984

素因数分解:

$2^5\times 3^2\times {\mathrm{61}}^1\times {\mathrm{1213}}^1$

素因数の和:1290

約数の個数: 72

約数和(自身を含む): 61644492

約数和(自身を除く): 40334508

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 61, 72, 96, 122, 144, 183, 244, 288, 366, 488, 549, 732, 976, 1098, 1213, 1464, 1952, 2196, 2426, 2928, 3639, 4392, 4852, 5856, 7278, 8784, 9704, 10917, 14556, 17568, 19408, 21834, 29112, 38816, 43668, 58224, 73993, 87336, 116448, 147986, 174672, 221979, 295972, 349344, 443958, 591944, 665937, 887916, 1183888, 1331874, 1775832, 2367776, 2663748, 3551664, 5327496, 7103328, 10654992, 21309984]

約数ペア:

[(1, 21309984), (2, 10654992), (3, 7103328), (4, 5327496), (6, 3551664), (8, 2663748), (9, 2367776), (12, 1775832), (16, 1331874), (18, 1183888), (24, 887916), (32, 665937), (36, 591944), (48, 443958), (61, 349344), (72, 295972), (96, 221979), (122, 174672), (144, 147986), (183, 116448), (244, 87336), (288, 73993), (366, 58224), (488, 43668), (549, 38816), (732, 29112), (976, 21834), (1098, 19408), (1213, 17568), (1464, 14556), (1952, 10917), (2196, 9704), (2426, 8784), (2928, 7278), (3639, 5856), (4392, 4852)]