20664875

素因数分解:

$5^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 34145280

約数和(自身を除く): 13480405

約数列:

[1, 5, 7, 11, 19, 25, 35, 55, 77, 95, 113, 125, 133, 175, 209, 275, 385, 475, 565, 665, 791, 875, 1045, 1243, 1375, 1463, 1925, 2147, 2375, 2825, 3325, 3955, 5225, 6215, 7315, 8701, 9625, 10735, 14125, 15029, 16625, 19775, 23617, 26125, 31075, 36575, 43505, 53675, 75145, 98875, 118085, 155375, 165319, 182875, 217525, 268375, 375725, 590425, 826595, 1087625, 1878625, 2952125, 4132975, 20664875]

約数ペア:

[(1, 20664875), (5, 4132975), (7, 2952125), (11, 1878625), (19, 1087625), (25, 826595), (35, 590425), (55, 375725), (77, 268375), (95, 217525), (113, 182875), (125, 165319), (133, 155375), (175, 118085), (209, 98875), (275, 75145), (385, 53675), (475, 43505), (565, 36575), (665, 31075), (791, 26125), (875, 23617), (1045, 19775), (1243, 16625), (1375, 15029), (1463, 14125), (1925, 10735), (2147, 9625), (2375, 8701), (2825, 7315), (3325, 6215), (3955, 5225)]