31819280

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 77338800

約数和(自身を除く): 45519520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 89, 109, 164, 178, 205, 218, 328, 356, 410, 436, 445, 545, 656, 712, 820, 872, 890, 1090, 1424, 1640, 1744, 1780, 2180, 3280, 3560, 3649, 4360, 4469, 7120, 7298, 8720, 8938, 9701, 14596, 17876, 18245, 19402, 22345, 29192, 35752, 36490, 38804, 44690, 48505, 58384, 71504, 72980, 77608, 89380, 97010, 145960, 155216, 178760, 194020, 291920, 357520, 388040, 397741, 776080, 795482, 1590964, 1988705, 3181928, 3977410, 6363856, 7954820, 15909640, 31819280]

約数ペア:

[(1, 31819280), (2, 15909640), (4, 7954820), (5, 6363856), (8, 3977410), (10, 3181928), (16, 1988705), (20, 1590964), (40, 795482), (41, 776080), (80, 397741), (82, 388040), (89, 357520), (109, 291920), (164, 194020), (178, 178760), (205, 155216), (218, 145960), (328, 97010), (356, 89380), (410, 77608), (436, 72980), (445, 71504), (545, 58384), (656, 48505), (712, 44690), (820, 38804), (872, 36490), (890, 35752), (1090, 29192), (1424, 22345), (1640, 19402), (1744, 18245), (1780, 17876), (2180, 14596), (3280, 9701), (3560, 8938), (3649, 8720), (4360, 7298), (4469, 7120)]