21106540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11597}}^1$

素因数の和:11626

約数の個数: 48

約数和(自身を含む): 54556992

約数和(自身を除く): 33450452

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11597, 23194, 46388, 57985, 81179, 115970, 150761, 162358, 231940, 301522, 324716, 405895, 603044, 753805, 811790, 1055327, 1507610, 1623580, 2110654, 3015220, 4221308, 5276635, 10553270, 21106540]

約数ペア:

[(1, 21106540), (2, 10553270), (4, 5276635), (5, 4221308), (7, 3015220), (10, 2110654), (13, 1623580), (14, 1507610), (20, 1055327), (26, 811790), (28, 753805), (35, 603044), (52, 405895), (65, 324716), (70, 301522), (91, 231940), (130, 162358), (140, 150761), (182, 115970), (260, 81179), (364, 57985), (455, 46388), (910, 23194), (1820, 11597)]