21456016

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{433}}^1$

素因数の和:623

約数の個数: 40

約数和(自身を含む): 44129120

約数和(自身を除く): 22673104

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 163, 304, 326, 433, 652, 866, 1304, 1732, 2608, 3097, 3464, 6194, 6928, 8227, 12388, 16454, 24776, 32908, 49552, 65816, 70579, 131632, 141158, 282316, 564632, 1129264, 1341001, 2682002, 5364004, 10728008, 21456016]

約数ペア:

[(1, 21456016), (2, 10728008), (4, 5364004), (8, 2682002), (16, 1341001), (19, 1129264), (38, 564632), (76, 282316), (152, 141158), (163, 131632), (304, 70579), (326, 65816), (433, 49552), (652, 32908), (866, 24776), (1304, 16454), (1732, 12388), (2608, 8227), (3097, 6928), (3464, 6194)]