81328860

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{823}}^1$

素因数の和:905

約数の個数: 120

約数和(自身を含む): 259629216

約数和(自身を除く): 178300356

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 61, 81, 90, 108, 122, 135, 162, 180, 183, 244, 270, 305, 324, 366, 405, 540, 549, 610, 732, 810, 823, 915, 1098, 1220, 1620, 1646, 1647, 1830, 2196, 2469, 2745, 3292, 3294, 3660, 4115, 4938, 4941, 5490, 6588, 7407, 8230, 8235, 9876, 9882, 10980, 12345, 14814, 16460, 16470, 19764, 22221, 24690, 24705, 29628, 32940, 37035, 44442, 49380, 49410, 50203, 66663, 74070, 88884, 98820, 100406, 111105, 133326, 148140, 150609, 200812, 222210, 251015, 266652, 301218, 333315, 444420, 451827, 502030, 602436, 666630, 753045, 903654, 1004060, 1333260, 1355481, 1506090, 1807308, 2259135, 2710962, 3012180, 4066443, 4518270, 5421924, 6777405, 8132886, 9036540, 13554810, 16265772, 20332215, 27109620, 40664430, 81328860]

約数ペア:

[(1, 81328860), (2, 40664430), (3, 27109620), (4, 20332215), (5, 16265772), (6, 13554810), (9, 9036540), (10, 8132886), (12, 6777405), (15, 5421924), (18, 4518270), (20, 4066443), (27, 3012180), (30, 2710962), (36, 2259135), (45, 1807308), (54, 1506090), (60, 1355481), (61, 1333260), (81, 1004060), (90, 903654), (108, 753045), (122, 666630), (135, 602436), (162, 502030), (180, 451827), (183, 444420), (244, 333315), (270, 301218), (305, 266652), (324, 251015), (366, 222210), (405, 200812), (540, 150609), (549, 148140), (610, 133326), (732, 111105), (810, 100406), (823, 98820), (915, 88884), (1098, 74070), (1220, 66663), (1620, 50203), (1646, 49410), (1647, 49380), (1830, 44442), (2196, 37035), (2469, 32940), (2745, 29628), (3292, 24705), (3294, 24690), (3660, 22221), (4115, 19764), (4938, 16470), (4941, 16460), (5490, 14814), (6588, 12345), (7407, 10980), (8230, 9882), (8235, 9876)]