81101025

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:407

約数の個数: 72

約数和(自身を含む): 155912640

約数和(自身を除く): 74811615

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 61, 75, 95, 171, 183, 225, 285, 305, 311, 475, 549, 855, 915, 933, 1159, 1425, 1525, 1555, 2745, 2799, 3477, 4275, 4575, 4665, 5795, 5909, 7775, 10431, 13725, 13995, 17385, 17727, 18971, 23325, 28975, 29545, 52155, 53181, 56913, 69975, 86925, 88635, 94855, 147725, 170739, 260775, 265905, 284565, 360449, 443175, 474275, 853695, 1081347, 1329525, 1422825, 1802245, 3244041, 4268475, 5406735, 9011225, 16220205, 27033675, 81101025]

約数ペア:

[(1, 81101025), (3, 27033675), (5, 16220205), (9, 9011225), (15, 5406735), (19, 4268475), (25, 3244041), (45, 1802245), (57, 1422825), (61, 1329525), (75, 1081347), (95, 853695), (171, 474275), (183, 443175), (225, 360449), (285, 284565), (305, 265905), (311, 260775), (475, 170739), (549, 147725), (855, 94855), (915, 88635), (933, 86925), (1159, 69975), (1425, 56913), (1525, 53181), (1555, 52155), (2745, 29545), (2799, 28975), (3477, 23325), (4275, 18971), (4575, 17727), (4665, 17385), (5795, 13995), (5909, 13725), (7775, 10431)]