81519690

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{20431}}^1$

素因数の和:20467

約数の個数: 64

約数和(自身を含む): 235376640

約数和(自身を除く): 153856950

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 105, 114, 133, 190, 210, 266, 285, 399, 570, 665, 798, 1330, 1995, 3990, 20431, 40862, 61293, 102155, 122586, 143017, 204310, 286034, 306465, 388189, 429051, 612930, 715085, 776378, 858102, 1164567, 1430170, 1940945, 2145255, 2329134, 2717323, 3881890, 4290510, 5434646, 5822835, 8151969, 11645670, 13586615, 16303938, 27173230, 40759845, 81519690]

約数ペア:

[(1, 81519690), (2, 40759845), (3, 27173230), (5, 16303938), (6, 13586615), (7, 11645670), (10, 8151969), (14, 5822835), (15, 5434646), (19, 4290510), (21, 3881890), (30, 2717323), (35, 2329134), (38, 2145255), (42, 1940945), (57, 1430170), (70, 1164567), (95, 858102), (105, 776378), (114, 715085), (133, 612930), (190, 429051), (210, 388189), (266, 306465), (285, 286034), (399, 204310), (570, 143017), (665, 122586), (798, 102155), (1330, 61293), (1995, 40862), (3990, 20431)]