21403984

素因数分解:

$2^4\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1187}}^1$

素因数の和:1232

約数の個数: 60

約数和(自身を含む): 50380704

約数和(自身を除く): 28976720

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 46, 49, 56, 92, 98, 112, 161, 184, 196, 322, 368, 392, 644, 784, 1127, 1187, 1288, 2254, 2374, 2576, 4508, 4748, 8309, 9016, 9496, 16618, 18032, 18992, 27301, 33236, 54602, 58163, 66472, 109204, 116326, 132944, 191107, 218408, 232652, 382214, 436816, 465304, 764428, 930608, 1337749, 1528856, 2675498, 3057712, 5350996, 10701992, 21403984]

約数ペア:

[(1, 21403984), (2, 10701992), (4, 5350996), (7, 3057712), (8, 2675498), (14, 1528856), (16, 1337749), (23, 930608), (28, 764428), (46, 465304), (49, 436816), (56, 382214), (92, 232652), (98, 218408), (112, 191107), (161, 132944), (184, 116326), (196, 109204), (322, 66472), (368, 58163), (392, 54602), (644, 33236), (784, 27301), (1127, 18992), (1187, 18032), (1288, 16618), (2254, 9496), (2374, 9016), (2576, 8309), (4508, 4748)]