21711800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 56246400

約数和(自身を除く): 34534600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 71, 88, 100, 110, 139, 142, 200, 220, 275, 278, 284, 355, 440, 550, 556, 568, 695, 710, 781, 1100, 1112, 1390, 1420, 1529, 1562, 1775, 2200, 2780, 2840, 3058, 3124, 3475, 3550, 3905, 5560, 6116, 6248, 6950, 7100, 7645, 7810, 9869, 12232, 13900, 14200, 15290, 15620, 19525, 19738, 27800, 30580, 31240, 38225, 39050, 39476, 49345, 61160, 76450, 78100, 78952, 98690, 108559, 152900, 156200, 197380, 217118, 246725, 305800, 394760, 434236, 493450, 542795, 868472, 986900, 1085590, 1973800, 2171180, 2713975, 4342360, 5427950, 10855900, 21711800]

約数ペア:

[(1, 21711800), (2, 10855900), (4, 5427950), (5, 4342360), (8, 2713975), (10, 2171180), (11, 1973800), (20, 1085590), (22, 986900), (25, 868472), (40, 542795), (44, 493450), (50, 434236), (55, 394760), (71, 305800), (88, 246725), (100, 217118), (110, 197380), (139, 156200), (142, 152900), (200, 108559), (220, 98690), (275, 78952), (278, 78100), (284, 76450), (355, 61160), (440, 49345), (550, 39476), (556, 39050), (568, 38225), (695, 31240), (710, 30580), (781, 27800), (1100, 19738), (1112, 19525), (1390, 15620), (1420, 15290), (1529, 14200), (1562, 13900), (1775, 12232), (2200, 9869), (2780, 7810), (2840, 7645), (3058, 7100), (3124, 6950), (3475, 6248), (3550, 6116), (3905, 5560)]