21669025

素因数分解:

$5^2\times 7^4\times {\mathrm{19}}^2$

素因数の和:76

約数の個数: 45

約数和(自身を含む): 33082611

約数和(自身を除く): 11413586

約数列:

[1, 5, 7, 19, 25, 35, 49, 95, 133, 175, 245, 343, 361, 475, 665, 931, 1225, 1715, 1805, 2401, 2527, 3325, 4655, 6517, 8575, 9025, 12005, 12635, 17689, 23275, 32585, 45619, 60025, 63175, 88445, 123823, 162925, 228095, 442225, 619115, 866761, 1140475, 3095575, 4333805, 21669025]

約数ペア:

[(1, 21669025), (5, 4333805), (7, 3095575), (19, 1140475), (25, 866761), (35, 619115), (49, 442225), (95, 228095), (133, 162925), (175, 123823), (245, 88445), (343, 63175), (361, 60025), (475, 45619), (665, 32585), (931, 23275), (1225, 17689), (1715, 12635), (1805, 12005), (2401, 9025), (2527, 8575), (3325, 6517)]