31256225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1249}}^1$

素因数の和:1290

約数の個数: 48

約数和(自身を含む): 52080000

約数和(自身を除く): 20823775

約数列:

[1, 5, 7, 11, 13, 25, 35, 55, 65, 77, 91, 143, 175, 275, 325, 385, 455, 715, 1001, 1249, 1925, 2275, 3575, 5005, 6245, 8743, 13739, 16237, 25025, 31225, 43715, 68695, 81185, 96173, 113659, 178607, 218575, 343475, 405925, 480865, 568295, 893035, 1250249, 2404325, 2841475, 4465175, 6251245, 31256225]

約数ペア:

[(1, 31256225), (5, 6251245), (7, 4465175), (11, 2841475), (13, 2404325), (25, 1250249), (35, 893035), (55, 568295), (65, 480865), (77, 405925), (91, 343475), (143, 218575), (175, 178607), (275, 113659), (325, 96173), (385, 81185), (455, 68695), (715, 43715), (1001, 31225), (1249, 25025), (1925, 16237), (2275, 13739), (3575, 8743), (5005, 6245)]