81358725

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4999}}^1$

素因数の和:5050

約数の個数: 48

約数和(自身を含む): 158720000

約数和(自身を除く): 77361275

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 75, 93, 105, 155, 175, 217, 465, 525, 651, 775, 1085, 2325, 3255, 4999, 5425, 14997, 16275, 24995, 34993, 74985, 104979, 124975, 154969, 174965, 374925, 464907, 524895, 774845, 874825, 1084783, 2324535, 2624475, 3254349, 3874225, 5423915, 11622675, 16271745, 27119575, 81358725]

約数ペア:

[(1, 81358725), (3, 27119575), (5, 16271745), (7, 11622675), (15, 5423915), (21, 3874225), (25, 3254349), (31, 2624475), (35, 2324535), (75, 1084783), (93, 874825), (105, 774845), (155, 524895), (175, 464907), (217, 374925), (465, 174965), (525, 154969), (651, 124975), (775, 104979), (1085, 74985), (2325, 34993), (3255, 24995), (4999, 16275), (5425, 14997)]