21908425

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 35712000

約数和(自身を除く): 13803575

約数列:

[1, 5, 7, 11, 19, 25, 35, 55, 77, 95, 133, 175, 209, 275, 385, 475, 599, 665, 1045, 1463, 1925, 2995, 3325, 4193, 5225, 6589, 7315, 11381, 14975, 20965, 32945, 36575, 46123, 56905, 79667, 104825, 125191, 164725, 230615, 284525, 398335, 625955, 876337, 1153075, 1991675, 3129775, 4381685, 21908425]

約数ペア:

[(1, 21908425), (5, 4381685), (7, 3129775), (11, 1991675), (19, 1153075), (25, 876337), (35, 625955), (55, 398335), (77, 284525), (95, 230615), (133, 164725), (175, 125191), (209, 104825), (275, 79667), (385, 56905), (475, 46123), (599, 36575), (665, 32945), (1045, 20965), (1463, 14975), (1925, 11381), (2995, 7315), (3325, 6589), (4193, 5225)]