21798840

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25951}}^1$

素因数の和:25972

約数の個数: 64

約数和(自身を含む): 74741760

約数和(自身を除く): 52942920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25951, 51902, 77853, 103804, 129755, 155706, 181657, 207608, 259510, 311412, 363314, 389265, 519020, 544971, 622824, 726628, 778530, 908285, 1038040, 1089942, 1453256, 1557060, 1816570, 2179884, 2724855, 3114120, 3633140, 4359768, 5449710, 7266280, 10899420, 21798840]

約数ペア:

[(1, 21798840), (2, 10899420), (3, 7266280), (4, 5449710), (5, 4359768), (6, 3633140), (7, 3114120), (8, 2724855), (10, 2179884), (12, 1816570), (14, 1557060), (15, 1453256), (20, 1089942), (21, 1038040), (24, 908285), (28, 778530), (30, 726628), (35, 622824), (40, 544971), (42, 519020), (56, 389265), (60, 363314), (70, 311412), (84, 259510), (105, 207608), (120, 181657), (140, 155706), (168, 129755), (210, 103804), (280, 77853), (420, 51902), (840, 25951)]