21236240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8563}}^1$

素因数の和:8607

約数の個数: 40

約数和(自身を含む): 50972928

約数和(自身を除く): 29736688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8563, 17126, 34252, 42815, 68504, 85630, 137008, 171260, 265453, 342520, 530906, 685040, 1061812, 1327265, 2123624, 2654530, 4247248, 5309060, 10618120, 21236240]

約数ペア:

[(1, 21236240), (2, 10618120), (4, 5309060), (5, 4247248), (8, 2654530), (10, 2123624), (16, 1327265), (20, 1061812), (31, 685040), (40, 530906), (62, 342520), (80, 265453), (124, 171260), (155, 137008), (248, 85630), (310, 68504), (496, 42815), (620, 34252), (1240, 17126), (2480, 8563)]