21414820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{1013}}^1$

素因数の和:1180

約数の個数: 48

約数和(自身を含む): 51787008

約数和(自身を除く): 30372188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 1013, 1057, 1510, 2026, 2114, 3020, 4052, 4228, 5065, 5285, 7091, 10130, 10570, 14182, 20260, 21140, 28364, 35455, 70910, 141820, 152963, 305926, 611852, 764815, 1070741, 1529630, 2141482, 3059260, 4282964, 5353705, 10707410, 21414820]

約数ペア:

[(1, 21414820), (2, 10707410), (4, 5353705), (5, 4282964), (7, 3059260), (10, 2141482), (14, 1529630), (20, 1070741), (28, 764815), (35, 611852), (70, 305926), (140, 152963), (151, 141820), (302, 70910), (604, 35455), (755, 28364), (1013, 21140), (1057, 20260), (1510, 14182), (2026, 10570), (2114, 10130), (3020, 7091), (4052, 5285), (4228, 5065)]