21478208

素因数分解:

$2^6\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1039}}^1$

素因数の和:1087

約数の個数: 56

約数和(自身を含む): 47548800

約数和(自身を除く): 26070592

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 64, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1039, 1088, 1216, 1292, 2078, 2584, 4156, 5168, 8312, 10336, 16624, 17663, 19741, 20672, 33248, 35326, 39482, 66496, 70652, 78964, 141304, 157928, 282608, 315856, 335597, 565216, 631712, 671194, 1130432, 1263424, 1342388, 2684776, 5369552, 10739104, 21478208]

約数ペア:

[(1, 21478208), (2, 10739104), (4, 5369552), (8, 2684776), (16, 1342388), (17, 1263424), (19, 1130432), (32, 671194), (34, 631712), (38, 565216), (64, 335597), (68, 315856), (76, 282608), (136, 157928), (152, 141304), (272, 78964), (304, 70652), (323, 66496), (544, 39482), (608, 35326), (646, 33248), (1039, 20672), (1088, 19741), (1216, 17663), (1292, 16624), (2078, 10336), (2584, 8312), (4156, 5168)]