21096520

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^2\times {\mathrm{997}}^1$

素因数の和:1054

約数の個数: 48

約数和(自身を含む): 49670460

約数和(自身を除く): 28573940

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 529, 920, 997, 1058, 1994, 2116, 2645, 3988, 4232, 4985, 5290, 7976, 9970, 10580, 19940, 21160, 22931, 39880, 45862, 91724, 114655, 183448, 229310, 458620, 527413, 917240, 1054826, 2109652, 2637065, 4219304, 5274130, 10548260, 21096520]

約数ペア:

[(1, 21096520), (2, 10548260), (4, 5274130), (5, 4219304), (8, 2637065), (10, 2109652), (20, 1054826), (23, 917240), (40, 527413), (46, 458620), (92, 229310), (115, 183448), (184, 114655), (230, 91724), (460, 45862), (529, 39880), (920, 22931), (997, 21160), (1058, 19940), (1994, 10580), (2116, 9970), (2645, 7976), (3988, 5290), (4232, 4985)]