81909285

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 145489920

約数和(自身を除く): 63580635

約数列:

[1, 3, 5, 15, 19, 31, 57, 73, 93, 95, 127, 155, 219, 285, 365, 381, 465, 589, 635, 1095, 1387, 1767, 1905, 2263, 2413, 2945, 3937, 4161, 6789, 6935, 7239, 8835, 9271, 11315, 11811, 12065, 19685, 20805, 27813, 33945, 36195, 42997, 46355, 59055, 74803, 128991, 139065, 176149, 214985, 224409, 287401, 374015, 528447, 644955, 862203, 880745, 1122045, 1437005, 2642235, 4311015, 5460619, 16381857, 27303095, 81909285]

約数ペア:

[(1, 81909285), (3, 27303095), (5, 16381857), (15, 5460619), (19, 4311015), (31, 2642235), (57, 1437005), (73, 1122045), (93, 880745), (95, 862203), (127, 644955), (155, 528447), (219, 374015), (285, 287401), (365, 224409), (381, 214985), (465, 176149), (589, 139065), (635, 128991), (1095, 74803), (1387, 59055), (1767, 46355), (1905, 42997), (2263, 36195), (2413, 33945), (2945, 27813), (3937, 20805), (4161, 19685), (6789, 12065), (6935, 11811), (7239, 11315), (8835, 9271)]