81912700

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 183738240

約数和(自身を除く): 101825540

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 83, 100, 139, 142, 166, 278, 284, 332, 355, 415, 556, 695, 710, 830, 1390, 1420, 1660, 1775, 2075, 2780, 3475, 3550, 4150, 5893, 6950, 7100, 8300, 9869, 11537, 11786, 13900, 19738, 23074, 23572, 29465, 39476, 46148, 49345, 57685, 58930, 98690, 115370, 117860, 147325, 197380, 230740, 246725, 288425, 294650, 493450, 576850, 589300, 819127, 986900, 1153700, 1638254, 3276508, 4095635, 8191270, 16382540, 20478175, 40956350, 81912700]

約数ペア:

[(1, 81912700), (2, 40956350), (4, 20478175), (5, 16382540), (10, 8191270), (20, 4095635), (25, 3276508), (50, 1638254), (71, 1153700), (83, 986900), (100, 819127), (139, 589300), (142, 576850), (166, 493450), (278, 294650), (284, 288425), (332, 246725), (355, 230740), (415, 197380), (556, 147325), (695, 117860), (710, 115370), (830, 98690), (1390, 58930), (1420, 57685), (1660, 49345), (1775, 46148), (2075, 39476), (2780, 29465), (3475, 23572), (3550, 23074), (4150, 19738), (5893, 13900), (6950, 11786), (7100, 11537), (8300, 9869)]