18914984960

素因数分解:

$2^{10}\times 5^1\times {\mathrm{389}}^1\times {\mathrm{9497}}^1$

素因数の和:9911

約数の個数: 88

約数和(自身を含む): 45495230040

約数和(自身を除く): 26580245080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 389, 512, 640, 778, 1024, 1280, 1556, 1945, 2560, 3112, 3890, 5120, 6224, 7780, 9497, 12448, 15560, 18994, 24896, 31120, 37988, 47485, 49792, 62240, 75976, 94970, 99584, 124480, 151952, 189940, 199168, 248960, 303904, 379880, 398336, 497920, 607808, 759760, 995840, 1215616, 1519520, 1991680, 2431232, 3039040, 3694333, 4862464, 6078080, 7388666, 9724928, 12156160, 14777332, 18471665, 24312320, 29554664, 36943330, 48624640, 59109328, 73886660, 118218656, 147773320, 236437312, 295546640, 472874624, 591093280, 945749248, 1182186560, 1891498496, 2364373120, 3782996992, 4728746240, 9457492480, 18914984960]

約数ペア:

[(1, 18914984960), (2, 9457492480), (4, 4728746240), (5, 3782996992), (8, 2364373120), (10, 1891498496), (16, 1182186560), (20, 945749248), (32, 591093280), (40, 472874624), (64, 295546640), (80, 236437312), (128, 147773320), (160, 118218656), (256, 73886660), (320, 59109328), (389, 48624640), (512, 36943330), (640, 29554664), (778, 24312320), (1024, 18471665), (1280, 14777332), (1556, 12156160), (1945, 9724928), (2560, 7388666), (3112, 6078080), (3890, 4862464), (5120, 3694333), (6224, 3039040), (7780, 2431232), (9497, 1991680), (12448, 1519520), (15560, 1215616), (18994, 995840), (24896, 759760), (31120, 607808), (37988, 497920), (47485, 398336), (49792, 379880), (62240, 303904), (75976, 248960), (94970, 199168), (99584, 189940), (124480, 151952)]