21381036380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1451}}^1\times {\mathrm{6089}}^1$

素因数の和:7571

約数の個数: 72

約数和(自身を含む): 49395210480

約数和(自身を除く): 28014174100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 1451, 2420, 2902, 5804, 6089, 7255, 12178, 14510, 15961, 24356, 29020, 30445, 31922, 60890, 63844, 66979, 79805, 121780, 133958, 159610, 175571, 267916, 319220, 334895, 351142, 669790, 702284, 736769, 877855, 1339580, 1473538, 1755710, 2947076, 3511420, 3683845, 7367690, 8835139, 14735380, 17670278, 35340556, 44175695, 88351390, 97186529, 176702780, 194373058, 388746116, 485932645, 971865290, 1069051819, 1943730580, 2138103638, 4276207276, 5345259095, 10690518190, 21381036380]

約数ペア:

[(1, 21381036380), (2, 10690518190), (4, 5345259095), (5, 4276207276), (10, 2138103638), (11, 1943730580), (20, 1069051819), (22, 971865290), (44, 485932645), (55, 388746116), (110, 194373058), (121, 176702780), (220, 97186529), (242, 88351390), (484, 44175695), (605, 35340556), (1210, 17670278), (1451, 14735380), (2420, 8835139), (2902, 7367690), (5804, 3683845), (6089, 3511420), (7255, 2947076), (12178, 1755710), (14510, 1473538), (15961, 1339580), (24356, 877855), (29020, 736769), (30445, 702284), (31922, 669790), (60890, 351142), (63844, 334895), (66979, 319220), (79805, 267916), (121780, 175571), (133958, 159610)]