19983375

素因数分解:

$3^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:246

約数の個数: 64

約数和(自身を含む): 38338560

約数和(自身を除く): 18355185

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 93, 125, 135, 155, 191, 225, 279, 375, 465, 573, 675, 775, 837, 955, 1125, 1395, 1719, 2325, 2865, 3375, 3875, 4185, 4775, 5157, 5921, 6975, 8595, 11625, 14325, 17763, 20925, 23875, 25785, 29605, 34875, 42975, 53289, 71625, 88815, 104625, 128925, 148025, 159867, 214875, 266445, 444075, 644625, 740125, 799335, 1332225, 2220375, 3996675, 6661125, 19983375]

約数ペア:

[(1, 19983375), (3, 6661125), (5, 3996675), (9, 2220375), (15, 1332225), (25, 799335), (27, 740125), (31, 644625), (45, 444075), (75, 266445), (93, 214875), (125, 159867), (135, 148025), (155, 128925), (191, 104625), (225, 88815), (279, 71625), (375, 53289), (465, 42975), (573, 34875), (675, 29605), (775, 25785), (837, 23875), (955, 20925), (1125, 17763), (1395, 14325), (1719, 11625), (2325, 8595), (2865, 6975), (3375, 5921), (3875, 5157), (4185, 4775)]