21821360

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:342

約数の個数: 80

約数和(自身を含む): 56058912

約数和(自身を除く): 34237552

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 137, 176, 181, 220, 274, 362, 440, 548, 685, 724, 880, 905, 1096, 1370, 1448, 1507, 1810, 1991, 2192, 2740, 2896, 3014, 3620, 3982, 5480, 6028, 7240, 7535, 7964, 9955, 10960, 12056, 14480, 15070, 15928, 19910, 24112, 24797, 30140, 31856, 39820, 49594, 60280, 79640, 99188, 120560, 123985, 159280, 198376, 247970, 272767, 396752, 495940, 545534, 991880, 1091068, 1363835, 1983760, 2182136, 2727670, 4364272, 5455340, 10910680, 21821360]

約数ペア:

[(1, 21821360), (2, 10910680), (4, 5455340), (5, 4364272), (8, 2727670), (10, 2182136), (11, 1983760), (16, 1363835), (20, 1091068), (22, 991880), (40, 545534), (44, 495940), (55, 396752), (80, 272767), (88, 247970), (110, 198376), (137, 159280), (176, 123985), (181, 120560), (220, 99188), (274, 79640), (362, 60280), (440, 49594), (548, 39820), (685, 31856), (724, 30140), (880, 24797), (905, 24112), (1096, 19910), (1370, 15928), (1448, 15070), (1507, 14480), (1810, 12056), (1991, 10960), (2192, 9955), (2740, 7964), (2896, 7535), (3014, 7240), (3620, 6028), (3982, 5480)]