21206625

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:179

約数の個数: 64

約数和(自身を含む): 39626496

約数和(自身を除く): 18419871

約数列:

[1, 3, 5, 11, 15, 25, 33, 53, 55, 75, 97, 125, 159, 165, 265, 275, 291, 375, 485, 583, 795, 825, 1067, 1325, 1375, 1455, 1749, 2425, 2915, 3201, 3975, 4125, 5141, 5335, 6625, 7275, 8745, 12125, 14575, 15423, 16005, 19875, 25705, 26675, 36375, 43725, 56551, 72875, 77115, 80025, 128525, 133375, 169653, 218625, 282755, 385575, 400125, 642625, 848265, 1413775, 1927875, 4241325, 7068875, 21206625]

約数ペア:

[(1, 21206625), (3, 7068875), (5, 4241325), (11, 1927875), (15, 1413775), (25, 848265), (33, 642625), (53, 400125), (55, 385575), (75, 282755), (97, 218625), (125, 169653), (159, 133375), (165, 128525), (265, 80025), (275, 77115), (291, 72875), (375, 56551), (485, 43725), (583, 36375), (795, 26675), (825, 25705), (1067, 19875), (1325, 16005), (1375, 15423), (1455, 14575), (1749, 12125), (2425, 8745), (2915, 7275), (3201, 6625), (3975, 5335), (4125, 5141)]