21010920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25013}}^1$

素因数の和:25034

約数の個数: 64

約数和(自身を含む): 72040320

約数和(自身を除く): 51029400

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, 25013, 50026, 75039, 100052, 125065, 150078, 175091, 200104, 250130, 300156, 350182, 375195, 500260, 525273, 600312, 700364, 750390, 875455, 1000520, 1050546, 1400728, 1500780, 1750910, 2101092, 2626365, 3001560, 3501820, 4202184, 5252730, 7003640, 10505460, 21010920]

約数ペア:

[(1, 21010920), (2, 10505460), (3, 7003640), (4, 5252730), (5, 4202184), (6, 3501820), (7, 3001560), (8, 2626365), (10, 2101092), (12, 1750910), (14, 1500780), (15, 1400728), (20, 1050546), (21, 1000520), (24, 875455), (28, 750390), (30, 700364), (35, 600312), (40, 525273), (42, 500260), (56, 375195), (60, 350182), (70, 300156), (84, 250130), (105, 200104), (120, 175091), (140, 150078), (168, 125065), (210, 100052), (280, 75039), (420, 50026), (840, 25013)]