81780408

素因数分解:

$2^3\times 3^3\times {\mathrm{19}}^1\times {\mathrm{19927}}^1$

素因数の和:19961

約数の個数: 64

約数和(自身を含む): 239136000

約数和(自身を除く): 157355592

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 19, 24, 27, 36, 38, 54, 57, 72, 76, 108, 114, 152, 171, 216, 228, 342, 456, 513, 684, 1026, 1368, 2052, 4104, 19927, 39854, 59781, 79708, 119562, 159416, 179343, 239124, 358686, 378613, 478248, 538029, 717372, 757226, 1076058, 1135839, 1434744, 1514452, 2152116, 2271678, 3028904, 3407517, 4304232, 4543356, 6815034, 9086712, 10222551, 13630068, 20445102, 27260136, 40890204, 81780408]

約数ペア:

[(1, 81780408), (2, 40890204), (3, 27260136), (4, 20445102), (6, 13630068), (8, 10222551), (9, 9086712), (12, 6815034), (18, 4543356), (19, 4304232), (24, 3407517), (27, 3028904), (36, 2271678), (38, 2152116), (54, 1514452), (57, 1434744), (72, 1135839), (76, 1076058), (108, 757226), (114, 717372), (152, 538029), (171, 478248), (216, 378613), (228, 358686), (342, 239124), (456, 179343), (513, 159416), (684, 119562), (1026, 79708), (1368, 59781), (2052, 39854), (4104, 19927)]