21662641

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:134

約数の個数: 64

約数和(自身を含む): 32901120

約数和(自身を除く): 11238479

約数列:

[1, 7, 11, 13, 17, 19, 67, 77, 91, 119, 133, 143, 187, 209, 221, 247, 323, 469, 737, 871, 1001, 1139, 1273, 1309, 1463, 1547, 1729, 2261, 2431, 2717, 3553, 4199, 5159, 6097, 7973, 8911, 9581, 12529, 14003, 14807, 16549, 17017, 19019, 21641, 24871, 29393, 46189, 67067, 87703, 98021, 103649, 115843, 151487, 162877, 182039, 238051, 281333, 323323, 1140139, 1274273, 1666357, 1969331, 3094663, 21662641]

約数ペア:

[(1, 21662641), (7, 3094663), (11, 1969331), (13, 1666357), (17, 1274273), (19, 1140139), (67, 323323), (77, 281333), (91, 238051), (119, 182039), (133, 162877), (143, 151487), (187, 115843), (209, 103649), (221, 98021), (247, 87703), (323, 67067), (469, 46189), (737, 29393), (871, 24871), (1001, 21641), (1139, 19019), (1273, 17017), (1309, 16549), (1463, 14807), (1547, 14003), (1729, 12529), (2261, 9581), (2431, 8911), (2717, 7973), (3553, 6097), (4199, 5159)]