21012978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{16139}}^1$

素因数の和:16182

約数の個数: 32

約数和(自身を含む): 49582080

約数和(自身を除く): 28569102

約数列:

[1, 2, 3, 6, 7, 14, 21, 31, 42, 62, 93, 186, 217, 434, 651, 1302, 16139, 32278, 48417, 96834, 112973, 225946, 338919, 500309, 677838, 1000618, 1500927, 3001854, 3502163, 7004326, 10506489, 21012978]

約数ペア:

[(1, 21012978), (2, 10506489), (3, 7004326), (6, 3502163), (7, 3001854), (14, 1500927), (21, 1000618), (31, 677838), (42, 500309), (62, 338919), (93, 225946), (186, 112973), (217, 96834), (434, 48417), (651, 32278), (1302, 16139)]