21239720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27947}}^1$

素因数の和:27977

約数の個数: 32

約数和(自身を含む): 50306400

約数和(自身を除く): 29066680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27947, 55894, 111788, 139735, 223576, 279470, 530993, 558940, 1061986, 1117880, 2123972, 2654965, 4247944, 5309930, 10619860, 21239720]

約数ペア:

[(1, 21239720), (2, 10619860), (4, 5309930), (5, 4247944), (8, 2654965), (10, 2123972), (19, 1117880), (20, 1061986), (38, 558940), (40, 530993), (76, 279470), (95, 223576), (152, 139735), (190, 111788), (380, 55894), (760, 27947)]