21115900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 50795360

約数和(自身を除く): 29679460

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 37, 50, 52, 65, 74, 100, 130, 148, 185, 260, 325, 370, 439, 481, 650, 740, 878, 925, 962, 1300, 1756, 1850, 1924, 2195, 2405, 3700, 4390, 4810, 5707, 8780, 9620, 10975, 11414, 12025, 16243, 21950, 22828, 24050, 28535, 32486, 43900, 48100, 57070, 64972, 81215, 114140, 142675, 162430, 211159, 285350, 324860, 406075, 422318, 570700, 812150, 844636, 1055795, 1624300, 2111590, 4223180, 5278975, 10557950, 21115900]

約数ペア:

[(1, 21115900), (2, 10557950), (4, 5278975), (5, 4223180), (10, 2111590), (13, 1624300), (20, 1055795), (25, 844636), (26, 812150), (37, 570700), (50, 422318), (52, 406075), (65, 324860), (74, 285350), (100, 211159), (130, 162430), (148, 142675), (185, 114140), (260, 81215), (325, 64972), (370, 57070), (439, 48100), (481, 43900), (650, 32486), (740, 28535), (878, 24050), (925, 22828), (962, 21950), (1300, 16243), (1756, 12025), (1850, 11414), (1924, 10975), (2195, 9620), (2405, 8780), (3700, 5707), (4390, 4810)]